From 42df95953b43bdb68caccb996409edfae70a3b94 Mon Sep 17 00:00:00 2001
From: Stephen Toub <stoub@microsoft.com>
Date: Mon, 15 Oct 2018 21:18:18 -0400
Subject: [PATCH] Add IAsyncDisposable

---
 .../shared/System.Private.CoreLib.Shared.projitems     |  1 +
 .../shared/System/IAsyncDisposable.cs                  | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 src/System.Private.CoreLib/shared/System/IAsyncDisposable.cs

diff --git a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
index 3b74957..25b0dbb 100644
--- a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
+++ b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
@@ -210,6 +210,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Guid.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\HashCode.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\HResults.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\IAsyncDisposable.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\IAsyncResult.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\ICloneable.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\IComparable.cs" />
diff --git a/src/System.Private.CoreLib/shared/System/IAsyncDisposable.cs b/src/System.Private.CoreLib/shared/System/IAsyncDisposable.cs
new file mode 100644
index 0000000..c29f549
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/IAsyncDisposable.cs
@@ -0,0 +1,18 @@
+// 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.Threading.Tasks;
+
+namespace System
+{
+    /// <summary>Provides a mechanism for releasing unmanaged resources asynchronously.</summary>
+    public interface IAsyncDisposable
+    {
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or
+        /// resetting unmanaged resources asynchronously.
+        /// </summary>
+        ValueTask DisposeAsync();
+    }
+}
-- 
2.7.4