Why does foreach fail to find my GetEnumerator extension method?

Question

I\'m trying to make some code more readable. For Example foreach(var row in table) {...} rather than foreach(DataRow row in table.Rows) {...}.

Answer 1

Your extension is equivalent to:

    public static IEnumerable GetEnumerator( this DataTable tbl ) {
        foreach ( TDataRow r in tbl.Rows ) yield return r;
    }

GetEnumerator is not the same method as GetEnumerator

This will work better:

    public static IEnumerable GetEnumerator( this DataTable tbl ) {
        foreach (DataRow r in tbl.Rows ) yield return r;
    }