Change/Set the name of the column in the DataColumnCollection.

DataColumn col= new DataColumn();
col.ColumnName = "SupplierID";
col.AutoIncrement = false;
// Add the column to the datatable
mydatatable.Columns.Add(col);

Read more: http://feeds.dzone.com/~r/dzone/snippets/~3/XN-bp3kxZwY/14601