To add new records into a dataset, a new data row must be created and added to the DataRow collection (Rows) of a DataTable in the dataset. The following procedures show how to create a new row and insert it into a DataTable. Examples are provided for both typed and untyped datasets.

I created this Dataset (view picture).

dsOperation dt = new dsOperation(); 

DataRow opRow = dt.Tables["Operations"].NewRow(); 

opRow["Group"] = "FirstGroup"; 

opRow["SubGroup"] = "SecondGroup"; 

opRow["Debit"] = 0; 

opRow["Credit"] = 10; 

dt.Tables[0].Rows.Add(opRow);