Returning null when key is not found

A11y.csproj

@@ -17,7 +17,7 @@
     <DebugSymbols>true</DebugSymbols>
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
+    <OutputPath>\\10.247.233.94\A11y\bin\Debug\</OutputPath>
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
@@ -85,4 +85,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>

EdgeStrategy.cs

@@ -11,7 +11,7 @@ namespace Microsoft.Edge.A11y
     /// </summary>
     internal class EdgeStrategy : TestStrategy
     {
-        public EdgeStrategy(string repositoryPath = "https://cdn.rawgit.com/DHBrett/AT-browser-tests/gh-pages/test-files/", string fileSuffix = ""){
+        public EdgeStrategy(string repositoryPath = "https://rawgit.com/DHBrett/AT-browser-tests/gh-pages/test-files/", string fileSuffix = ""){
             _driverManager = new DriverManager(TimeSpan.FromSeconds(10));
             System.Threading.Thread.Sleep(TimeSpan.FromSeconds(2));//Wait for the browser to load before we start searching
             _RepositoryPath = repositoryPath;

ElementConverter.cs

@@ -24,7 +24,7 @@ namespace Microsoft.Edge.A11y
             }
             else
             {
-                throw new Exception("Code " + key + " was not found.");
+                return null;
             }
         }