Random random = new Random(); int num = random.Next(10000000); string numy = num.ToString(); string connectionString = @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=cms;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False"; SqlConnection connection = new SqlConnection(@connectionString); string query = "INSERT INTO users (ID,Password) VALUES('"+numy+"','01')"; SqlCommand command = new SqlCommand(query, connection); try { connection.Open(); command.ExecuteNonQuery(); MessageBox.Show("Records Inserted Successfully"); } catch (SqlException x) { MessageBox.Show("Error Generated. Details: " + x.ToString()); } finally { connection.Close(); }