1 files changed, 19 insertions, 0 deletions
diff --git a/Rx/NET/Source/System.Reactive.Interfaces/Reactive/IEventPatternSource.cs b/Rx/NET/Source/System.Reactive.Interfaces/Reactive/IEventPatternSource.cs
new file mode 100644
index 0000000..d87010d
--- /dev/null
+++ b/Rx/NET/Source/System.Reactive.Interfaces/Reactive/IEventPatternSource.cs
@@ -0,0 +1,19 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+namespace System.Reactive
+{
+    /// <summary>
+    /// Represents a data stream signaling its elements by means of an event.
+    /// </summary>
+    /// <typeparam name="TEventArgs">The type of the event data generated by the event.</typeparam>
+    public interface IEventPatternSource<TEventArgs>
+#if !NO_EVENTARGS_CONSTRAINT
+        where TEventArgs : EventArgs
+#endif
+    {
+        /// <summary>
+        /// Event signaling the next element in the data stream.
+        /// </summary>
+        event EventHandler<TEventArgs> OnNext;
+    }
+}