How to add recod to data table using loop

DataTable TableTransferNoteMain = new DataTable();
TableTransferNoteMain.Columns.Add("TrnNo",typeof(int));
for (int i = 0;i < 100; i++)
{
TableTransferNoteMain.Rows.Add(i) 

}//how to retrieve The Values of above table using column name like this 

for (int j = 0 ; j < TableTransferNoteMain.rows.count())
{
 int TrnNumber = TableTransferNoteMain.column["TrnNO"].value  // this is what i am expecting how to do this requirement 
}