Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/Common/AdapterSwitches.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <copyright file="AdapterSwitches.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">markash</owner>
+// <owner current="true" primary="false">laled</owner>
+//------------------------------------------------------------------------------
+
+#if DEBUG
+
+using System.Diagnostics;
+
+namespace System.Data.Common {
+
+    internal static class AdapterSwitches {
+
+        static private TraceSwitch _dataSchema;
+
+        static internal TraceSwitch DataSchema {
+            get {
+                TraceSwitch dataSchema = _dataSchema;
+                if (null == dataSchema) {
+                    _dataSchema = dataSchema = new TraceSwitch("Data.Schema", "Enable tracing for schema actions.");
+                }
+                return dataSchema;
+            }
+        }
+    }
+}
+#endif