1 files changed, 2 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Diagnostics/Eventing/TraceLogging/SimpleTypeInfos.cs b/src/mscorlib/src/System/Diagnostics/Eventing/TraceLogging/SimpleTypeInfos.cs
index e51aff0380..901a0ed1a2 100644
--- a/src/mscorlib/src/System/Diagnostics/Eventing/TraceLogging/SimpleTypeInfos.cs
+++ b/src/mscorlib/src/System/Diagnostics/Eventing/TraceLogging/SimpleTypeInfos.cs
@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Reflection;
+using System.Diagnostics;
 
 #if !ES_BUILD_AGAINST_DOTNET_V35
 using Contract = System.Diagnostics.Contracts.Contract;
@@ -269,7 +270,7 @@ namespace System.Diagnostics.Tracing
             : base(type)
         {
             var typeArgs = type.GenericTypeArguments;
-            Contract.Assert(typeArgs.Length == 1);
+            Debug.Assert(typeArgs.Length == 1);
             this.valueInfo = TraceLoggingTypeInfo.GetInstance(typeArgs[0], recursionCheck);
             this.hasValueGetter = PropertyValue.GetPropertyGetter(type.GetTypeInfo().GetDeclaredProperty("HasValue"));
             this.valueGetter = PropertyValue.GetPropertyGetter(type.GetTypeInfo().GetDeclaredProperty("Value"));