امتحان کردم نشدش
 cmd.CommandText = "insert into jeens(name,color,price,size,priceforoosh,g_type,g_  producter) values(N'" + txtG_Name.Text+" سایز: "+size + "','" + txtG_Color.Text + "'," + Int32.Parse(txtpricekharid.Text) + ",'" + size + "'," + Int32.Parse(txtG_Price.Text) + ",'" + txtg_type.Text + "','" + txtg_producter.Text + "')";