Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/diagnostics/conditionalattribute.cs

@@ -0,0 +1,27 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+using System;
+
+namespace System.Diagnostics {
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, AllowMultiple=true)]
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class ConditionalAttribute : Attribute
+    {
+        public ConditionalAttribute(String conditionString)
+        {
+            m_conditionString = conditionString;
+        }
+
+        public String ConditionString {
+            get {
+                return m_conditionString;
+            }
+        }
+
+        private String m_conditionString;
+    }
+}