System.Data.DataKey.ContainsColumn C# (CSharp) Method

        internal bool ContainsColumn(DataColumn column)
        {
            for (int i = 0; i < _columns.Length; i++)
            {
                if (column == _columns[i])
                {
                    return true;
                }
            }
            return false;
        }

 internal override bool ContainsColumn(DataColumn column)
 {
     return(_key.ContainsColumn(column));
 }