1 files changed, 15 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/IProgress.cs b/src/mscorlib/shared/System/IProgress.cs
new file mode 100644
index 0000000000..724c7bdce9
--- /dev/null
+++ b/src/mscorlib/shared/System/IProgress.cs
@@ -0,0 +1,15 @@
+// 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.
+
+namespace System
+{
+    /// <summary>Defines a provider for progress updates.</summary>
+    /// <typeparam name="T">The type of progress update value.</typeparam>
+    public interface IProgress<in T>
+    {
+        /// <summary>Reports a progress update.</summary>
+        /// <param name="value">The value of the updated progress.</param>
+        void Report(T value);
+    }
+}