"insert into stud_Exam_Record(PRN,Roll_no,First_name,Last_Name, UN1_Total,UN2_Total,Final_total,Final_Outof,Percen tage)values('" + textBox1.Text + "','" + textBox2.Text + "'," + textBox3.Text + "," + textBox4.Text + ",'" + textBox5.Text + "','" + textBox6.Text + "','" + textBox7.Text + "','" + textBox8.Text + "','" + textBox9.Text + "') ";
but i face error "The name "fsdgf" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted." data type of First_name is ntext ,please help me