System.Data.DataColumnCollection.Add C# (CSharp) Метод

        public void Add(DataColumn column)
        {
            AddAt(-1, column);
        }

 private DataColumn[] FilterColumns(DataTable sourceTable, string[] hiddenColumnNames, DataColumnCollection destinationColumns)
 {
     DataColumn[] columnArray = null;
     int num = 0;
     foreach (DataColumn column3 in sourceTable.Columns)
     {
         if (this.IncludeThisColumn(column3, hiddenColumnNames))
         {
             num++;
         }
     }
     if (num == 0)
     {
         throw ADP.NoColumns();
     }
     int index = 0;
     columnArray = new DataColumn[num];
     foreach (DataColumn column in sourceTable.Columns)
     {
         if (this.IncludeThisColumn(column, hiddenColumnNames))
         {
             DataColumn column2 = new DataColumn(column.ColumnName, column.DataType);
             destinationColumns.Add(column2);
             columnArray[index] = column;
             index++;
         }
     }
     return columnArray;
 }