System.Data.Common.DataTableMapping.GetColumnMappingBySchemaAction C# (CSharp) Method

        public DataColumnMapping GetColumnMappingBySchemaAction(string sourceColumn, MissingMappingAction mappingAction)
        {
            return DataColumnMappingCollection.GetColumnMappingBySchemaAction(_columnMappings, sourceColumn, mappingAction);
        }

 private DataColumn GetParameterDataColumn(String columnName, DataTableMapping mappings, DataRow row)
 {
     if (!ADP.IsEmpty(columnName))
     {
         DataColumnMapping columnMapping = mappings.GetColumnMappingBySchemaAction(columnName, this.missingMapping);
         if (null != columnMapping)
         {
             return(columnMapping.GetDataColumnBySchemaAction(row.Table, null, missingSchema));
         }
     }
     return(null);
 }