Answer Posted / karthikeyan

String connectionString = @"Data
Source=.\SQLExpress;Initial Catalog=Nwind;Integrated
Security=SSPI";
SqlConnection con = new SqlConnection(connectionString);
string conString = "Select * From Customers";
SqlDataAdapter dataAdpter = new SqlDataAdapter(conString,
con);
DataSet ds = new DataSet();
dataAdpter.Fill(ds);
ds.Tables[0].Columns[0].ReadOnly = true;
dataGridView1.DataSource = ds.Tables[0];

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