diff --git a/src/Umbraco.Core/StringExtensions.cs b/src/Umbraco.Core/StringExtensions.cs
index d61c0a87ca..9152d686a2 100644
--- a/src/Umbraco.Core/StringExtensions.cs
+++ b/src/Umbraco.Core/StringExtensions.cs
@@ -938,7 +938,22 @@ namespace Umbraco.Core
             return text;
         }
 
+        /// <summary>
+        /// Returns a new string in which only the first occurrence of a specified string is replaced by a specified replacement string.
+        /// </summary>
+        /// <param name="text">The string to filter.</param>
+        /// <param name="search">The string to replace.</param>
+        /// <param name="replace">The replacement string.</param>
+        /// <returns>The filtered string.</returns>
+        public static string ReplaceFirst(this string text, string search, string replace)
+        {
+            var pos = text.IndexOf(search);
 
+            if (pos < 0)
+                return text;
+
+            return text.Substring(0, pos) + replace + text.Substring(pos + search.Length);
+        }
 
 
 
diff --git a/src/Umbraco.Web/Editors/CodeFileController.cs b/src/Umbraco.Web/Editors/CodeFileController.cs
index 325b39e4f2..2de3283b95 100644
--- a/src/Umbraco.Web/Editors/CodeFileController.cs
+++ b/src/Umbraco.Web/Editors/CodeFileController.cs
@@ -5,7 +5,6 @@ using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Web.Http;
-using ClientDependency.Core;
 using Umbraco.Core;
 using Umbraco.Core.Cache;
 using Umbraco.Core.Configuration;