Just pass CommandType.Text by default instead of null. You would not have to check anything.

>I want to set up the following:
>
>

>public DataSet ExecuteQuery(string sCommand, string sTableName, SqlParameter[] aParams)
>{
>    return ExecuteQuery(sCommand, sTableName, aParams, null);
>}
>public DataSet ExecuteQuery(string sCommand, string sTableName, SqlParameter[] aParams, CommandType Type)
>{
>.
>.
>.
>    if (Type == null)
>    {
>        Type = CommandType.Text;
>    }
>    oCommand.CommandType = Type;
>
>}
>

>
>This doesn't compile because I can't pass null to the last param, and I can't check in the IF to see if the param is null. What's the right way to do this?