>>>I don't see GetNonNull in intellisense.
>>>
>>>What am I doing wrong?
>>
>>string _ProjectName = ds.Tables[0].Rows[0]["ProjectName"].ToString();
>>
>>_ProjectName = _ProjectName.GetNonNull(); // would this work?
>
>Not for non-string values. If the data type of the column is int and it's null, it would error before it got to the GetNonNull line.

Did you try using var or int? ?