diff --git a/microsoft-ajax/microsoft.ajax-tests.ts b/microsoft-ajax/microsoft.ajax-tests.ts
index 4b334cad0..3e1f44f0e 100644
--- a/microsoft-ajax/microsoft.ajax-tests.ts
+++ b/microsoft-ajax/microsoft.ajax-tests.ts
@@ -432,6 +432,30 @@ function Sys_Res_Tests() {
var nullWebRequest = Sys.Res.nullWebRequest;
}
+function Sys_StringBuilder_Tests() {
+
+ // Example taken from http://msdn.microsoft.com/en-us/library/bb310852(v=vs.100).aspx
+ function buildAString(title: string) {
+ var headTagStart = "";
+ var headTagEnd = "";
+ var titleTagStart = "";
+ var titleTagEnd = "";
+
+ var sb = new Sys.StringBuilder(this._headTagStart);
+ sb.append(titleTagEnd);
+ sb.append(title);
+ sb.append(titleTagEnd);
+ sb.append(headTagEnd);
+ // Displays: "The result: A Title"
+ alert("The result" + sb.toString());
+ }
+
+ var title = "A Title";
+ buildAString(title);
+
+
+}
+
function Sys_Services_Profile_Service_Group_Tests() {
var Street = Sys.Services.ProfileService.properties.Address.Street;