Web Matrix solution: The call is ambiguous between the following methods or properties

If you get the following error:

The call is ambiguous between the following methods or properties: ‘System.IO.TextWriter.Write(string, params object[])’ and ‘System.IO.TextWriter.Write(char[])’

Check to be sure that the expression being written to your page isn’t null.  If it is null, ASP.NET doesn’t know what method to call.