diff --git a/Directory.Packages.props b/Directory.Packages.props
index d90b85b8..a0e08792 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -31,7 +31,7 @@
     <PackageVersion Include="Microsoft.VisualStudio.Shell.Framework" Version="17.4.33103.184" />
     <PackageVersion Include="Microsoft.VisualStudio.Validation" Version="17.8.8" />
     <PackageVersion Include="Microsoft.Win32.Registry" Version="5.0.0" />
-    <PackageVersion Include="Microsoft.Windows.CsWin32" Version="0.3.106" />
+    <PackageVersion Include="Microsoft.Windows.CsWin32" Version="0.3.162" />
     <PackageVersion Include="Nullable" Version="1.3.1" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
     <PackageVersion Include="System.Memory" Version="4.6.0" />
diff --git a/src/Microsoft.VisualStudio.Threading/NoMessagePumpSyncContext.cs b/src/Microsoft.VisualStudio.Threading/NoMessagePumpSyncContext.cs
index 5d1f1b58..feea9a50 100644
--- a/src/Microsoft.VisualStudio.Threading/NoMessagePumpSyncContext.cs
+++ b/src/Microsoft.VisualStudio.Threading/NoMessagePumpSyncContext.cs
@@ -47,7 +47,7 @@ public static SynchronizationContext Default
     /// <returns>
     /// The array index of the object that satisfied the wait.
     /// </returns>
-    public override int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
+    public override unsafe int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
     {
         Requires.NotNull(waitHandles, nameof(waitHandles));
 
@@ -61,7 +61,10 @@ public override int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTim
         if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
 #endif
         {
-            return (int)PInvoke.WaitForMultipleObjects(MemoryMarshal.Cast<IntPtr, HANDLE>(waitHandles), waitAll, (uint)millisecondsTimeout);
+            fixed (IntPtr* pHandles = waitHandles)
+            {
+                return (int)PInvoke.WaitForMultipleObjects((uint)waitHandles.Length, (HANDLE*)pHandles, waitAll, (uint)millisecondsTimeout);
+            }
         }
         else
         {