Imported Upstream version 1.1.0upstream/1.1.0

1 files changed, 915 insertions, 0 deletions

diff --git a/src/mscorlib/src/System/IO/TextWriter.cs b/src/mscorlib/src/System/IO/TextWriter.cs
new file mode 100644
index 0000000..165001e
--- /dev/null
+++ b/src/mscorlib/src/System/IO/TextWriter.cs
@@ -0,0 +1,915 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*============================================================
+**
+** 
+** 
+**
+**
+** Purpose: Abstract base class for Text-only Writers.
+** Subclasses will include StreamWriter & StringWriter.
+**
+**
+===========================================================*/
+
+using System;
+using System.Text;
+using System.Threading;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Reflection;
+using System.Security.Permissions;
+using System.Globalization;
+using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.Contracts;
+using System.Threading.Tasks;
+
+namespace System.IO {
+    // This abstract base class represents a writer that can write a sequential
+    // stream of characters. A subclass must minimally implement the 
+    // Write(char) method.
+    //
+    // This class is intended for character output, not bytes.  
+    // There are methods on the Stream class for writing bytes. 
+    [Serializable]
+    [ComVisible(true)]
+#if FEATURE_REMOTING
+    public abstract class TextWriter : MarshalByRefObject, IDisposable {
+#else // FEATURE_REMOTING
+    public abstract class TextWriter : IDisposable {
+#endif // FEATURE_REMOTING
+        public static readonly TextWriter Null = new NullTextWriter();
+
+        // This should be initialized to Environment.NewLine, but
+        // to avoid loading Environment unnecessarily so I've duplicated
+        // the value here.
+#if !PLATFORM_UNIX
+        private const String InitialNewLine = "\r\n";
+
+        protected char[] CoreNewLine = new char[] { '\r', '\n' };
+#else
+        private const String InitialNewLine = "\n";
+
+        protected char[] CoreNewLine = new char[] {'\n'};
+#endif // !PLATFORM_UNIX
+
+        // Can be null - if so, ask for the Thread's CurrentCulture every time.
+        private IFormatProvider InternalFormatProvider;
+
+        protected TextWriter()
+        {
+            InternalFormatProvider = null;  // Ask for CurrentCulture all the time.
+        }
+    
+        protected TextWriter(IFormatProvider formatProvider)
+        {
+            InternalFormatProvider = formatProvider;
+        }
+
+        public virtual IFormatProvider FormatProvider {
+            get { 
+                if (InternalFormatProvider == null)
+                    return Thread.CurrentThread.CurrentCulture;
+                else
+                    return InternalFormatProvider;
+            }
+        }
+
+        // Closes this TextWriter and releases any system resources associated with the
+        // TextWriter. Following a call to Close, any operations on the TextWriter
+        // may raise exceptions. This default method is empty, but descendant
+        // classes can override the method to provide the appropriate
+        // functionality.
+        public virtual void Close() {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+        }
+
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+    
+        // Clears all buffers for this TextWriter and causes any buffered data to be
+        // written to the underlying device. This default method is empty, but
+        // descendant classes can override the method to provide the appropriate
+        // functionality.
+        public virtual void Flush() {
+        }
+
+        public abstract Encoding Encoding {
+            get;
+        }
+
+        // Returns the line terminator string used by this TextWriter. The default line
+        // terminator string is a carriage return followed by a line feed ("\r\n").
+        //
+        // Sets the line terminator string for this TextWriter. The line terminator
+        // string is written to the text stream whenever one of the
+        // WriteLine methods are called. In order for text written by
+        // the TextWriter to be readable by a TextReader, only one of the following line
+        // terminator strings should be used: "\r", "\n", or "\r\n".
+        // 
+        public virtual String NewLine {
+            get { return new String(CoreNewLine); }
+            set {
+                if (value == null) 
+                    value = InitialNewLine;
+                CoreNewLine = value.ToCharArray();
+            }
+        }
+    
+
+        [HostProtection(Synchronization=true)]
+        public static TextWriter Synchronized(TextWriter writer) {
+            if (writer==null)
+                throw new ArgumentNullException("writer");
+            Contract.Ensures(Contract.Result<TextWriter>() != null);
+            Contract.EndContractBlock();
+
+            if (writer is SyncTextWriter)
+                return writer;
+            
+            return new SyncTextWriter(writer);
+        }
+        
+        // Writes a character to the text stream. This default method is empty,
+        // but descendant classes can override the method to provide the
+        // appropriate functionality.
+        //
+        public virtual void Write(char value) {
+        }
+    
+        // Writes a character array to the text stream. This default method calls
+        // Write(char) for each of the characters in the character array.
+        // If the character array is null, nothing is written.
+        //
+        public virtual void Write(char[] buffer) {
+            if (buffer != null) Write(buffer, 0, buffer.Length);
+        }
+    
+        // Writes a range of a character array to the text stream. This method will
+        // write count characters of data into this TextWriter from the
+        // buffer character array starting at position index.
+        //
+        public virtual void Write(char[] buffer, int index, int count) {
+            if (buffer==null)
+                throw new ArgumentNullException("buffer", Environment.GetResourceString("ArgumentNull_Buffer"));
+            if (index < 0)
+                throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
+            if (count < 0)
+                throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
+            if (buffer.Length - index < count)
+                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
+            Contract.EndContractBlock();
+
+            for (int i = 0; i < count; i++) Write(buffer[index + i]);
+        }
+    
+        // Writes the text representation of a boolean to the text stream. This
+        // method outputs either Boolean.TrueString or Boolean.FalseString.
+        //
+        public virtual void Write(bool value) {
+            Write(value ? Boolean.TrueLiteral : Boolean.FalseLiteral);
+        }
+    
+        // Writes the text representation of an integer to the text stream. The
+        // text representation of the given value is produced by calling the
+        // Int32.ToString() method.
+        //
+        public virtual void Write(int value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes the text representation of an integer to the text stream. The
+        // text representation of the given value is produced by calling the
+        // UInt32.ToString() method.
+        //
+        [CLSCompliant(false)]
+        public virtual void Write(uint value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes the text representation of a long to the text stream. The
+        // text representation of the given value is produced by calling the
+        // Int64.ToString() method.
+        //
+        public virtual void Write(long value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes the text representation of an unsigned long to the text 
+        // stream. The text representation of the given value is produced 
+        // by calling the UInt64.ToString() method.
+        //
+        [CLSCompliant(false)]
+        public virtual void Write(ulong value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes the text representation of a float to the text stream. The
+        // text representation of the given value is produced by calling the
+        // Float.toString(float) method.
+        //
+        public virtual void Write(float value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes the text representation of a double to the text stream. The
+        // text representation of the given value is produced by calling the
+        // Double.toString(double) method.
+        //
+        public virtual void Write(double value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        public virtual void Write(Decimal value) {
+            Write(value.ToString(FormatProvider));
+        }
+    
+        // Writes a string to the text stream. If the given string is null, nothing
+        // is written to the text stream.
+        //
+        public virtual void Write(String value) {
+            if (value != null) Write(value.ToCharArray());
+        }
+    
+        // Writes the text representation of an object to the text stream. If the
+        // given object is null, nothing is written to the text stream.
+        // Otherwise, the object's ToString method is called to produce the
+        // string representation, and the resulting string is then written to the
+        // output stream.
+        //
+        public virtual void Write(Object value) {
+            if (value != null) {
+                IFormattable f = value as IFormattable;
+                if (f != null)
+                    Write(f.ToString(null, FormatProvider));
+                else
+                    Write(value.ToString());
+            }
+        }
+    
+#if false
+    //      // Converts the wchar * to a string and writes this to the stream.
+    //      //
+    //      __attribute NonCLSCompliantAttribute()
+    //      public void Write(wchar *value) {
+    //          Write(new String(value));
+    //      }
+    
+    //      // Treats the byte* as a LPCSTR, converts it to a string, and writes it to the stream.
+    //      // 
+    //      __attribute NonCLSCompliantAttribute()
+    //      public void Write(byte *value) {
+    //          Write(new String(value));
+    //      }
+#endif
+    
+    
+        // Writes out a formatted string.  Uses the same semantics as
+        // String.Format.
+        // 
+        public virtual void Write(String format, Object arg0)
+        {
+            Write(String.Format(FormatProvider, format, arg0));
+        }
+        
+        // Writes out a formatted string.  Uses the same semantics as
+        // String.Format.
+        // 
+        public virtual void Write(String format, Object arg0, Object arg1)
+        {
+            Write(String.Format(FormatProvider, format, arg0, arg1));
+        }
+        
+        // Writes out a formatted string.  Uses the same semantics as
+        // String.Format.
+        // 
+        public virtual void Write(String format, Object arg0, Object arg1, Object arg2)
+        {
+            Write(String.Format(FormatProvider, format, arg0, arg1, arg2));
+        }
+        
+        // Writes out a formatted string.  Uses the same semantics as
+        // String.Format.
+        // 
+        public virtual void Write(String format, params Object[] arg)
+        {
+            Write(String.Format(FormatProvider, format, arg));
+        }
+        
+    
+        // Writes a line terminator to the text stream. The default line terminator
+        // is a carriage return followed by a line feed ("\r\n"), but this value
+        // can be changed by setting the NewLine property.
+        //
+        public virtual void WriteLine() {
+            Write(CoreNewLine);
+        }
+    
+        // Writes a character followed by a line terminator to the text stream.
+        //
+        public virtual void WriteLine(char value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes an array of characters followed by a line terminator to the text
+        // stream.
+        //
+        public virtual void WriteLine(char[] buffer) {
+            Write(buffer);
+            WriteLine();
+        }
+    
+        // Writes a range of a character array followed by a line terminator to the
+        // text stream.
+        //
+        public virtual void WriteLine(char[] buffer, int index, int count) {
+            Write(buffer, index, count);
+            WriteLine();
+        }
+    
+        // Writes the text representation of a boolean followed by a line
+        // terminator to the text stream.
+        //
+        public virtual void WriteLine(bool value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of an integer followed by a line
+        // terminator to the text stream.
+        //
+        public virtual void WriteLine(int value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of an unsigned integer followed by 
+        // a line terminator to the text stream.
+        //
+        [CLSCompliant(false)]
+        public virtual void WriteLine(uint value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of a long followed by a line terminator
+        // to the text stream.
+        //
+        public virtual void WriteLine(long value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of an unsigned long followed by 
+        // a line terminator to the text stream.
+        //
+        [CLSCompliant(false)]
+        public virtual void WriteLine(ulong value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of a float followed by a line terminator
+        // to the text stream.
+        //
+        public virtual void WriteLine(float value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes the text representation of a double followed by a line terminator
+        // to the text stream.
+        //
+        public virtual void WriteLine(double value) {
+            Write(value);
+            WriteLine();
+        }
+
+        public virtual void WriteLine(decimal value) {
+            Write(value);
+            WriteLine();
+        }
+    
+        // Writes a string followed by a line terminator to the text stream.
+        //
+        public virtual void WriteLine(String value) {
+
+            if (value==null) {
+                WriteLine();
+            }
+            else {
+                // We'd ideally like WriteLine to be atomic, in that one call
+                // to WriteLine equals one call to the OS (ie, so writing to 
+                // console while simultaneously calling printf will guarantee we
+                // write out a string and new line chars, without any interference).
+                // Additionally, we need to call ToCharArray on Strings anyways,
+                // so allocating a char[] here isn't any worse than what we were
+                // doing anyways.  We do reduce the number of calls to the 
+                // backing store this way, potentially.
+                int vLen = value.Length;
+                int nlLen = CoreNewLine.Length;
+                char[] chars = new char[vLen+nlLen];
+                value.CopyTo(0, chars, 0, vLen);
+                // CoreNewLine will almost always be 2 chars, and possibly 1.
+                if (nlLen == 2) {
+                    chars[vLen] = CoreNewLine[0];
+                    chars[vLen+1] = CoreNewLine[1];
+                }
+                else if (nlLen == 1)
+                    chars[vLen] = CoreNewLine[0];
+                else
+                    Buffer.InternalBlockCopy(CoreNewLine, 0, chars, vLen * 2, nlLen * 2);
+                Write(chars, 0, vLen + nlLen);
+            }
+            /*
+            Write(value);  // We could call Write(String) on StreamWriter...
+            WriteLine();
+            */
+        }
+    
+        // Writes the text representation of an object followed by a line
+        // terminator to the text stream.
+        //
+        public virtual void WriteLine(Object value) {
+            if (value==null) {
+                WriteLine();
+            }
+            else {
+                // Call WriteLine(value.ToString), not Write(Object), WriteLine().
+                // This makes calls to WriteLine(Object) atomic.
+                IFormattable f = value as IFormattable;
+                if (f != null)
+                    WriteLine(f.ToString(null, FormatProvider));
+                else
+                    WriteLine(value.ToString());
+            }
+        }
+
+        // Writes out a formatted string and a new line.  Uses the same 
+        // semantics as String.Format.
+        // 
+        public virtual void WriteLine(String format, Object arg0)
+        {
+            WriteLine(String.Format(FormatProvider, format, arg0));
+        }
+        
+        // Writes out a formatted string and a new line.  Uses the same 
+        // semantics as String.Format.
+        // 
+        public virtual void WriteLine (String format, Object arg0, Object arg1)
+        {
+            WriteLine(String.Format(FormatProvider, format, arg0, arg1));
+        }
+        
+        // Writes out a formatted string and a new line.  Uses the same 
+        // semantics as String.Format.
+        // 
+        public virtual void WriteLine (String format, Object arg0, Object arg1, Object arg2)
+        {
+            WriteLine(String.Format(FormatProvider, format, arg0, arg1, arg2));
+        }
+        
+        // Writes out a formatted string and a new line.  Uses the same 
+        // semantics as String.Format.
+        // 
+        public virtual void WriteLine (String format, params Object[] arg)
+        {
+            WriteLine(String.Format(FormatProvider, format, arg));
+        }
+
+        #region Task based Async APIs
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteAsync(char value)
+        {
+            var tuple = new Tuple<TextWriter, char>(this, value);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, char>)state;
+                t.Item1.Write(t.Item2);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteAsync(String value)
+        {
+            var tuple = new Tuple<TextWriter, string>(this, value);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, string>)state;
+                t.Item1.Write(t.Item2);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public Task WriteAsync(char[] buffer)
+        {
+            if (buffer == null)  return Task.CompletedTask;
+            return WriteAsync(buffer, 0, buffer.Length);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteAsync(char[] buffer, int index, int count)
+        {
+            var tuple = new Tuple<TextWriter, char[], int, int>(this, buffer, index, count);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, char[], int, int>)state;
+                t.Item1.Write(t.Item2, t.Item3, t.Item4);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteLineAsync(char value)
+        {
+            var tuple = new Tuple<TextWriter, char>(this, value);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, char>)state;
+                t.Item1.WriteLine(t.Item2);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteLineAsync(String value)
+        {
+            var tuple = new Tuple<TextWriter, string>(this, value);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, string>)state;
+                t.Item1.WriteLine(t.Item2);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public Task WriteLineAsync(char[] buffer)
+        {
+            if (buffer == null)  return Task.CompletedTask;
+            return WriteLineAsync(buffer, 0, buffer.Length);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteLineAsync(char[] buffer, int index, int count)
+        {
+            var tuple = new Tuple<TextWriter, char[], int, int>(this, buffer, index, count);
+            return Task.Factory.StartNew(state =>
+            {
+                var t = (Tuple<TextWriter, char[], int, int>)state;
+                t.Item1.WriteLine(t.Item2, t.Item3, t.Item4);
+            },
+            tuple, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task WriteLineAsync()
+        {
+            return WriteAsync(CoreNewLine);
+        }
+
+        [HostProtection(ExternalThreading = true)]
+        [ComVisible(false)]
+        public virtual Task FlushAsync()
+        {
+            return Task.Factory.StartNew(state =>
+            {
+                ((TextWriter)state).Flush();
+            },
+            this, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+        }
+        #endregion
+
+        [Serializable]
+        private sealed class NullTextWriter : TextWriter
+        {
+            internal NullTextWriter(): base(CultureInfo.InvariantCulture) {
+            }
+        
+            public override Encoding Encoding {
+                get { return Encoding.Default;  }
+            }
+
+            [SuppressMessage("Microsoft.Contracts", "CC1055")]  // Skip extra error checking to avoid *potential* AppCompat problems.
+            public override void Write(char[] buffer, int index, int count) {
+            }
+            
+            public override void Write(String value) {
+            }
+
+            // Not strictly necessary, but for perf reasons
+            public override void WriteLine() {
+            }
+
+            // Not strictly necessary, but for perf reasons
+            public override void WriteLine(String value) {
+            }
+            
+            public override void WriteLine(Object value) {
+            }
+        }
+        
+        [Serializable]
+        internal sealed class SyncTextWriter : TextWriter, IDisposable
+        {
+            private TextWriter _out;
+            
+            internal SyncTextWriter(TextWriter t): base(t.FormatProvider) {
+                _out = t;
+            }
+
+            public override Encoding Encoding {
+                get { return _out.Encoding;  }
+            }
+
+            public override IFormatProvider FormatProvider {
+                get { return _out.FormatProvider;  }
+            }
+            
+            public override  String NewLine {
+                [MethodImplAttribute(MethodImplOptions.Synchronized)]
+                get { return _out.NewLine; }
+                [MethodImplAttribute(MethodImplOptions.Synchronized)]
+                set { _out.NewLine = value; }
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Close() {
+                // So that any overriden Close() gets run
+                _out.Close();
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            protected override void Dispose(bool disposing) {
+                // Explicitly pick up a potentially methodimpl'ed Dispose
+                if (disposing)
+                    ((IDisposable)_out).Dispose();
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Flush() {
+                _out.Flush();
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(char value) {
+                _out.Write(value);
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(char[] buffer) {
+                _out.Write(buffer);
+            }
+
+            [SuppressMessage("Microsoft.Contracts", "CC1055")]  // Skip extra error checking to avoid *potential* AppCompat problems.
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(char[] buffer, int index, int count) {
+                _out.Write(buffer, index, count);
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(bool value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(int value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(uint value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(long value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(ulong value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(float value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(double value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(Decimal value) {
+                _out.Write(value);
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(String value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(Object value) {
+                _out.Write(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(String format, Object arg0) {
+                _out.Write(format, arg0);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(String format, Object arg0, Object arg1) {
+                _out.Write(format, arg0, arg1);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(String format, Object arg0, Object arg1, Object arg2) {
+                _out.Write(format, arg0, arg1, arg2);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void Write(String format, Object[] arg) {
+                _out.Write(format, arg);
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine() {
+                _out.WriteLine();
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(char value) {
+                _out.WriteLine(value);
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(decimal value) {
+                _out.WriteLine(value);
+            }
+    
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(char[] buffer) {
+                _out.WriteLine(buffer);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(char[] buffer, int index, int count) {
+                _out.WriteLine(buffer, index, count);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(bool value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(int value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(uint value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(long value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(ulong value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(float value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(double value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(String value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(Object value) {
+                _out.WriteLine(value);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(String format, Object arg0) {
+                _out.WriteLine(format, arg0);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(String format, Object arg0, Object arg1) {
+                _out.WriteLine(format, arg0, arg1);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(String format, Object arg0, Object arg1, Object arg2) {
+                _out.WriteLine(format, arg0, arg1, arg2);
+            }
+            
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            public override void WriteLine(String format, Object[] arg) {
+                _out.WriteLine(format, arg);
+            }
+
+
+            //
+            // On SyncTextWriter all APIs should run synchronously, even the async ones.
+            //
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteAsync(char value)
+            {
+                Write(value);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteAsync(String value)
+            {
+                Write(value);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteAsync(char[] buffer, int index, int count)
+            {
+                Write(buffer, index, count);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteLineAsync(char value)
+            {
+                WriteLine(value);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteLineAsync(String value)
+            {
+                WriteLine(value);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task WriteLineAsync(char[] buffer, int index, int count)
+            {
+                WriteLine(buffer, index, count);
+                return Task.CompletedTask;
+            }
+
+            [MethodImplAttribute(MethodImplOptions.Synchronized)]
+            [ComVisible(false)]
+            public override Task FlushAsync()
+            {
+                Flush();
+                return Task.CompletedTask;
+            }
+        }
+    }
+}