diff --git a/src/Microsoft.AspNet.Routing/InlineRouteParameterParser.cs b/src/Microsoft.AspNet.Routing/InlineRouteParameterParser.cs
index 57625f7049..193befa746 100644
--- a/src/Microsoft.AspNet.Routing/InlineRouteParameterParser.cs
+++ b/src/Microsoft.AspNet.Routing/InlineRouteParameterParser.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
+using System.Diagnostics;
 using System.Text.RegularExpressions;
 using Microsoft.AspNet.Routing.Template;
 
@@ -70,7 +70,7 @@ namespace Microsoft.AspNet.Routing
                 var defaultValueMatch = defaultValueGroup.Value;
 
                 // Strip out the equal sign at the beginning
-                Contract.Assert(defaultValueMatch.StartsWith("=", StringComparison.Ordinal));
+                Debug.Assert(defaultValueMatch.StartsWith("=", StringComparison.Ordinal));
                 return defaultValueMatch.Substring(1);
             }
 
diff --git a/src/Microsoft.AspNet.Routing/Template/TemplateBinder.cs b/src/Microsoft.AspNet.Routing/Template/TemplateBinder.cs
index 2934b6361e..62faf8db59 100644
--- a/src/Microsoft.AspNet.Routing/Template/TemplateBinder.cs
+++ b/src/Microsoft.AspNet.Routing/Template/TemplateBinder.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.Diagnostics.Contracts;
 using System.Globalization;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -178,8 +177,8 @@ namespace Microsoft.AspNet.Routing.Template
 
             for (var i = 0; i < _template.Segments.Count; i++)
             {
-                Contract.Assert(context.BufferState == SegmentState.Beginning);
-                Contract.Assert(context.UriState == SegmentState.Beginning);
+                Debug.Assert(context.BufferState == SegmentState.Beginning);
+                Debug.Assert(context.UriState == SegmentState.Beginning);
 
                 var segment = _template.Segments[i];
 
@@ -384,7 +383,7 @@ namespace Microsoft.AspNet.Routing.Template
 
             public void AcceptDefault(string key)
             {
-                Contract.Assert(!_acceptedValues.ContainsKey(key));
+                Debug.Assert(!_acceptedValues.ContainsKey(key));
 
                 object value;
                 if (_defaults != null && _defaults.TryGetValue(key, out value))
@@ -502,7 +501,7 @@ namespace Microsoft.AspNet.Routing.Template
 
                     // We've already checked the conditions that could result in a rejected part, so this should
                     // always be true.
-                    Contract.Assert(result);
+                    Debug.Assert(result);
 
                     return result;
                 }
diff --git a/src/Microsoft.AspNet.Routing/Template/TemplateMatcher.cs b/src/Microsoft.AspNet.Routing/Template/TemplateMatcher.cs
index 58d1e9e0cc..c1c80ff8de 100644
--- a/src/Microsoft.AspNet.Routing/Template/TemplateMatcher.cs
+++ b/src/Microsoft.AspNet.Routing/Template/TemplateMatcher.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
+using System.Diagnostics;
 
 namespace Microsoft.AspNet.Routing.Template
 {
@@ -59,7 +59,7 @@ namespace Microsoft.AspNet.Routing.Template
                     }
                     else
                     {
-                        Contract.Assert(part.IsParameter);
+                        Debug.Assert(part.IsParameter);
 
                         if (part.IsCatchAll)
                         {
@@ -133,7 +133,7 @@ namespace Microsoft.AspNet.Routing.Template
                     return null;
                 }
 
-                Contract.Assert(part.IsParameter);
+                Debug.Assert(part.IsParameter);
 
                 // It's ok for a catch-all to produce a null value
                 object defaultValue;
@@ -169,8 +169,8 @@ namespace Microsoft.AspNet.Routing.Template
                                          IReadOnlyDictionary<string, object> defaults,
                                          RouteValueDictionary values)
         {
-            Contract.Assert(routeSegment != null);
-            Contract.Assert(routeSegment.Parts.Count > 1);
+            Debug.Assert(routeSegment != null);
+            Debug.Assert(routeSegment.Parts.Count > 1);
 
             // Find last literal segment and get its last index in the string
             var lastIndex = requestSegment.Length;
@@ -191,7 +191,7 @@ namespace Microsoft.AspNet.Routing.Template
                 }
                 else
                 {
-                    Contract.Assert(part.IsLiteral);
+                    Debug.Assert(part.IsLiteral);
                     lastLiteral = part;
 
                     var startIndex = lastIndex - 1;
@@ -246,7 +246,7 @@ namespace Microsoft.AspNet.Routing.Template
                         else
                         {
                             parameterStartIndex = newLastIndex;
-                            Contract.Assert(false, "indexOfLastSegementUsed should always be 0 from the check above");
+                            Debug.Assert(false, "indexOfLastSegementUsed should always be 0 from the check above");
                         }
                         parameterTextLength = lastIndex;
                     }
diff --git a/src/Microsoft.AspNet.Routing/Template/TemplateParser.cs b/src/Microsoft.AspNet.Routing/Template/TemplateParser.cs
index ebd32088c6..31dbdc30f9 100644
--- a/src/Microsoft.AspNet.Routing/Template/TemplateParser.cs
+++ b/src/Microsoft.AspNet.Routing/Template/TemplateParser.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
+using System.Diagnostics;
 using System.Globalization;
 
 namespace Microsoft.AspNet.Routing.Template
@@ -62,8 +62,8 @@ namespace Microsoft.AspNet.Routing.Template
 
         private static bool ParseSegment(TemplateParserContext context, List<TemplateSegment> segments)
         {
-            Contract.Assert(context != null);
-            Contract.Assert(segments != null);
+            Debug.Assert(context != null);
+            Debug.Assert(segments != null);
 
             var segment = new TemplateSegment();
 
@@ -378,8 +378,8 @@ namespace Microsoft.AspNet.Routing.Template
 
         private static bool IsValidLiteral(TemplateParserContext context, string literal)
         {
-            Contract.Assert(context != null);
-            Contract.Assert(literal != null);
+            Debug.Assert(context != null);
+            Debug.Assert(literal != null);
 
             if (literal.IndexOf(QuestionMark) != -1)
             {
@@ -407,7 +407,7 @@ namespace Microsoft.AspNet.Routing.Template
 
             public TemplateParserContext(string template)
             {
-                Contract.Assert(template != null);
+                Debug.Assert(template != null);
                 _template = template;
 
                 _index = -1;
diff --git a/src/Microsoft.AspNet.Routing/project.json b/src/Microsoft.AspNet.Routing/project.json
index ee7e51354f..09081ae8e3 100644
--- a/src/Microsoft.AspNet.Routing/project.json
+++ b/src/Microsoft.AspNet.Routing/project.json
@@ -13,7 +13,6 @@
     "aspnet50": {},
     "aspnetcore50": {
       "dependencies": {
-        "System.Diagnostics.Contracts": "4.0.0-beta-*",
         "System.Reflection.Extensions": "4.0.0-beta-*",
         "System.Text.RegularExpressions": "4.0.10-beta-*"
       }