using(SqlConnection connection = new SqlConnection(_connectionString)) { String query = "INSERT INTO dbo.SMS_PW (id,username,password,email) VALUES (@id,@username,@password, @email)"; using(SqlCommand command = new SqlCommand(query, connection)) { command.Parameters.AddWithValue("@id", "abc"); command.Parameters.AddWithValue("@username", "abc"); command.Parameters.AddWithValue("@password", "abc"); command.Parameters.AddWithValue("@email", "abc"); connection.Open(); int result = command.ExecuteNonQuery(); // Check Error if(result < 0) Console.WriteLine("Error inserting data into Database!"); } }