1 files changed, 0 insertions, 76 deletions
diff --git a/src/mscorlib/corefx/System/IO/FileStream.NetStandard17.cs b/src/mscorlib/corefx/System/IO/FileStream.NetStandard17.cs
deleted file mode 100644
index dc1385fbc0..0000000000
--- a/src/mscorlib/corefx/System/IO/FileStream.NetStandard17.cs
+++ /dev/null
@@ -1,76 +0,0 @@
-// 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.
-
-using Microsoft.Win32.SafeHandles;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using System.Threading;
-
-namespace System.IO
-{
-    public partial class FileStream : Stream
-    {
-        public override IAsyncResult BeginRead(byte[] array, int offset, int numBytes, AsyncCallback callback, object state)
-        {
-            if (array == null)
-                throw new ArgumentNullException(nameof(array));
-            if (offset < 0)
-                throw new ArgumentOutOfRangeException(nameof(offset), SR.ArgumentOutOfRange_NeedNonNegNum);
-            if (numBytes < 0)
-                throw new ArgumentOutOfRangeException(nameof(numBytes), SR.ArgumentOutOfRange_NeedNonNegNum);
-            if (array.Length - offset < numBytes)
-                throw new ArgumentException(SR.Argument_InvalidOffLen);
-
-            if (IsClosed) throw new ObjectDisposedException(SR.ObjectDisposed_FileClosed);
-            if (!CanRead) throw new NotSupportedException(SR.NotSupported_UnreadableStream);
-
-            if (!IsAsync)
-                return base.BeginRead(array, offset, numBytes, callback, state);
-            else
-                return TaskToApm.Begin(ReadAsyncInternal(array, offset, numBytes, CancellationToken.None), callback, state);
-        }
-
-        public override IAsyncResult BeginWrite(byte[] array, int offset, int numBytes, AsyncCallback callback, object state)
-        {
-            if (array == null)
-                throw new ArgumentNullException(nameof(array));
-            if (offset < 0)
-                throw new ArgumentOutOfRangeException(nameof(offset), SR.ArgumentOutOfRange_NeedNonNegNum);
-            if (numBytes < 0)
-                throw new ArgumentOutOfRangeException(nameof(numBytes), SR.ArgumentOutOfRange_NeedNonNegNum);
-            if (array.Length - offset < numBytes)
-                throw new ArgumentException(SR.Argument_InvalidOffLen);
-
-            if (IsClosed) throw new ObjectDisposedException(SR.ObjectDisposed_FileClosed);
-            if (!CanWrite) throw new NotSupportedException(SR.NotSupported_UnwritableStream);
-
-            if (!IsAsync)
-                return base.BeginWrite(array, offset, numBytes, callback, state);
-            else
-                return TaskToApm.Begin(WriteAsyncInternal(array, offset, numBytes, CancellationToken.None), callback, state);
-        }
-
-        public override int EndRead(IAsyncResult asyncResult)
-        {
-            if (asyncResult == null)
-                throw new ArgumentNullException(nameof(asyncResult));
-
-            if (!IsAsync)
-                return base.EndRead(asyncResult);
-            else
-                return TaskToApm.End<int>(asyncResult);
-        }
-
-        public override void EndWrite(IAsyncResult asyncResult)
-        {
-            if (asyncResult == null)
-                throw new ArgumentNullException(nameof(asyncResult));
-
-            if (!IsAsync)
-                base.EndWrite(asyncResult);
-            else
-                TaskToApm.End(asyncResult);
-        }
-    }
-}