I have datatable , in the datatable my columns have space with name as like 'SAKHARE DAM' but problem is that datatable never accept spaces withing column name, so i can take compute for sum. I am dynamitically add columns in the datatable. mean i am doing as pivot table. The rows create as a column for gridview headers. Other wise if add a column with 'SAKHAR_DAM' as like underscore then how remove/ replace with space..