Как объявить скалярную переменную для sqlDataAdapter

  sqlConnection = new SqlConnection(@"Data Source=DESKTOP-Q7TEGKR;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False");
                    sqlConnection.Open();
 
                    sqlDataAdapter = new SqlDataAdapter("USE CollegeTest_DataBase select Answer_Id, AnswerText FROM ANSWER_TABLE where Question_Id = @Question_Id", sqlConnection);
 
                    sqlCommand5.Parameters.AddWithValue("Question_Id", Convert.ToInt32(QuestionId.Text));//ошибочный
 
                    DataTable = new DataTable();
 
                    sqlDataAdapter.Fill(DataTable);
                    DataGrid1.ItemsSource = DataTable.DefaultView;

sqlDataAdapter.SelectCommand.Parameters.AddWithValue("Question_Id", Convert.ToInt32(QuestionId.Text));

sqlConnection = new SqlConnection(@"Data Source=DESKTOP-Q7TEGKR; Initial Catalog=CollegeTest_DataBase; Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False");