Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

external/referencesource/System.Configuration/Microsoft/Win32/SafeNativeMethods.cs

@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+// <copyright file="SafeNativeMethods.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace Microsoft.Win32 {
+    using System.Runtime.InteropServices;
+    using System;
+    using System.Security.Permissions;
+    using System.Collections;
+    using System.IO;
+    using System.Text;
+    using System.Threading;
+    using Microsoft.Win32.SafeHandles;    
+
+    [ 
+    System.Security.SuppressUnmanagedCodeSecurityAttribute()
+    ]
+    internal static class SafeNativeMethods {
+#if NOPERF
+        [DllImport(ExternDll.Kernel32, SetLastError=true)]
+        internal static extern bool QueryPerformanceCounter(out long value);
+        
+        [DllImport(ExternDll.Kernel32, SetLastError=true)]
+        internal static extern bool QueryPerformanceFrequency(out long value);
+#endif
+    }
+}