How can i Datagridview column format

Question

Hi All, 

 

I want try to set format of datagridview column through below code

 but its showing error {"Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index"} 

 

InitializeComponent();

this.dataGridView1.Columns[8].DefaultCellStyle.Format = "0.0";