context.Response.ContentType = "text/plain";
context.Response.Write(returnString);
If returnString is NULL what will it pass, or will it fail?
EDIT: The question was if it is possible, the above was just an example which I realize I could have tested. However I am looking for any other possible ways to do this beyond just my code example, I just couldn't think of anything else to write in the body text without repeating information that is already in the question title.