set a text in DataGridViewTextBoxColumn

Hi all

im using a datagridview which is populated with DataGridViewTextBoxColumns. How can i put a text in a specific cell in the data grid view.

here is how i populate the datagridview--

 private void setUpGridTableForGridView(int rows, int columns)
        {
            
            for (int i = 0; i < columns;i++ )
            {
                DataGridViewTextBoxColumn dgc = new DataGridViewTextBoxColumn();
                RunTimeCreatedDataGridView.Columns.Add(dgc);
            }

            for (int i = 1; i < rows;i++ )
            {
                RunTimeCreatedDataGridView.Rows.Add();
            }
        }