Convert an array of integers for use in a SQL “IN” clause

Question

Surely there is a framework method that given an array of integers, strings etc converts them into a list that can be used in a SQL \"IN\" clause?

e.g.

Answer 1

/// 

/// Converts an array of integers into a string that may be used in a SQL IN expression.
/// 
/// The array to convert.
/// A string representing the array as a parenthetical comma-delemited list. If the array
/// is empty or missing, then "(null)" is returned.
public static string ToSqlInList(int[] values)
{
    if (values == null || values.Length == 0)
        return "(null)";  // In SQL the expression "IN (NULL)" is always false.

    return string.Concat("(", string.Join(",", Array.ConvertAll(values,x=>x.ToString())), ")");
}