Microsoft are imbeciles

BrokenUriBuilder.cs

var uriBuilder = new UriBuilder();
uriBuilder.Query = "foo=bar";
Console.WriteLine(uriBuilder.Query); // prints "?foo=bar"

uriBuilder.Query = uriBuilder.Query;
Console.WriteLine(uriBuilder.Query); // prints "??foo=bar"

// Someone at Microsoft needs a swift kick in the balls.