1 files changed, 51 insertions, 0 deletions
diff --git a/src/System.Private.CoreLib/shared/System/Threading/EventWaitHandle.cs b/src/System.Private.CoreLib/shared/System/Threading/EventWaitHandle.cs
new file mode 100644
index 000000000..4cd733b9b
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/Threading/EventWaitHandle.cs
@@ -0,0 +1,51 @@
+// 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;
+using System.IO;
+
+namespace System.Threading
+{
+    public partial class EventWaitHandle : WaitHandle
+    {
+        public EventWaitHandle(bool initialState, EventResetMode mode) :
+            this(initialState, mode, null, out _)
+        {
+        }
+
+        public EventWaitHandle(bool initialState, EventResetMode mode, string name) :
+            this(initialState, mode, name, out _)
+        {
+        }
+
+        public EventWaitHandle(bool initialState, EventResetMode mode, string name, out bool createdNew)
+        {
+            if (mode != EventResetMode.AutoReset && mode != EventResetMode.ManualReset)
+                throw new ArgumentException(SR.Argument_InvalidFlag, nameof(mode));
+
+            CreateEventCore(initialState, mode, name, out createdNew);
+        }
+
+        public static EventWaitHandle OpenExisting(string name)
+        {
+            EventWaitHandle result;
+            switch (OpenExistingWorker(name, out result))
+            {
+                case OpenExistingResult.NameNotFound:
+                    throw new WaitHandleCannotBeOpenedException();
+                case OpenExistingResult.NameInvalid:
+                    throw new WaitHandleCannotBeOpenedException(SR.Format(SR.Threading_WaitHandleCannotBeOpenedException_InvalidHandle, name));
+                case OpenExistingResult.PathNotFound:
+                    throw new DirectoryNotFoundException(SR.Format(SR.IO_PathNotFound_Path, name));
+                default:
+                    return result;
+            }
+        }
+
+        public static bool TryOpenExisting(string name, out EventWaitHandle result)
+        {
+            return OpenExistingWorker(name, out result) == OpenExistingResult.Success;
+        }
+    }
+}