1 files changed, 130 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Diagnostics/Tracing/TraceLogging/EventSourceOptions.cs b/src/mscorlib/shared/System/Diagnostics/Tracing/TraceLogging/EventSourceOptions.cs
new file mode 100644
index 0000000000..26305a5708
--- /dev/null
+++ b/src/mscorlib/shared/System/Diagnostics/Tracing/TraceLogging/EventSourceOptions.cs
@@ -0,0 +1,130 @@
+// 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 System;
+
+#if ES_BUILD_STANDALONE
+namespace Microsoft.Diagnostics.Tracing
+#else
+namespace System.Diagnostics.Tracing
+#endif
+{
+    /// <summary>
+    /// Used when calling EventSource.Write.
+    /// Optional overrides for event settings such as Level, Keywords, or Opcode.
+    /// If overrides are not provided for a setting, default values will be used.
+    /// </summary>
+    public struct EventSourceOptions
+    {
+        internal EventKeywords keywords;
+        internal EventTags tags;
+        internal EventActivityOptions activityOptions;
+        internal byte level;
+        internal byte opcode;
+        internal byte valuesSet;
+
+        internal const byte keywordsSet = 0x1;
+        internal const byte tagsSet = 0x2;
+        internal const byte levelSet = 0x4;
+        internal const byte opcodeSet = 0x8;
+        internal const byte activityOptionsSet = 0x10;
+
+        /// <summary>
+        /// Gets or sets the level to use for the specified event. If this property
+        /// is unset, the event's level will be 5 (Verbose).
+        /// </summary>
+        public EventLevel Level
+        {
+            get
+            {
+                return (EventLevel)this.level;
+            }
+
+            set
+            {
+                this.level = checked((byte)value);
+                this.valuesSet |= levelSet;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the opcode to use for the specified event. If this property
+        /// is unset, the event's opcode will 0 (Info).
+        /// </summary>
+        public EventOpcode Opcode
+        {
+            get
+            {
+                return (EventOpcode)this.opcode;
+            }
+
+            set
+            {
+                this.opcode = checked((byte)value);
+                this.valuesSet |= opcodeSet;
+            }
+        }
+
+        internal bool IsOpcodeSet
+        {
+            get
+            {
+                return (this.valuesSet & opcodeSet) != 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the keywords to use for the specified event. If this
+        /// property is unset, the event's keywords will be 0.
+        /// </summary>
+        public EventKeywords Keywords
+        {
+            get
+            {
+                return this.keywords;
+            }
+
+            set
+            {
+                this.keywords = value;
+                this.valuesSet |= keywordsSet;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the tags to use for the specified event. If this property is
+        /// unset, the event's tags will be 0.
+        /// </summary>
+        public EventTags Tags
+        {
+            get
+            {
+                return this.tags;
+            }
+
+            set
+            {
+                this.tags = value;
+                this.valuesSet |= tagsSet;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the activity options for this specified events. If this property is
+        /// unset, the event's activity options will be 0.
+        /// </summary>
+        public EventActivityOptions ActivityOptions
+        {
+            get
+            {
+                return this.activityOptions;
+            }
+            set
+            {
+                this.activityOptions = value;
+                this.valuesSet |= activityOptionsSet;
+            }
+        }
+    }
+}