System.Data.Common.DataTableMappingCollection.Contains C# (CSharp) Method

        public bool Contains(object value) => (-1 != IndexOf(value));

 public static DataTableMapping GetTableMappingBySchemaAction(DataTableMappingCollection tableMappings, string sourceTable, string dataSetTable, MissingMappingAction mappingAction)
 {
     if (tableMappings.Contains(sourceTable))
     {
         return(tableMappings[sourceTable]);
     }
     if (mappingAction == MissingMappingAction.Error)
     {
         throw new InvalidOperationException(String.Format("Missing source table mapping: '{0}'",
                                                           sourceTable));
     }
     if (mappingAction == MissingMappingAction.Ignore)
     {
         return(null);
     }
     return(new DataTableMapping(sourceTable, dataSetTable));
 }