SQL Server Связать столбцы двух таблиц

public partial class Form1 : Form
    {
        private SqlConnection Connection = new SqlConnection();
        static string ConnectionString = "Integrated Security = true; Data Source = ХХХ.ХХ.ХХ.ХХХ; Initial Catalog=dbMyDB";
        private DataSet DataSetDBUsers = new DataSet("DataSetUsers");
        private static SqlDataAdapter UsersDataAdapter = new SqlDataAdapter("SELECT * FROM Users", ConnectionString);
        private static SqlDataAdapter AccountDataAdapter = new SqlDataAdapter("SELECT * FROM Accounts", ConnectionString); // WHERE Users.ID_Account = Accounts.ID_Account
        private SqlCommandBuilder UsersCommandBuilder = new SqlCommandBuilder(UsersDataAdapter);
        private SqlCommandBuilder AccountCommandBuilder = new SqlCommandBuilder(AccountDataAdapter);
public Form1()
        {
            InitializeComponent();
            SqlConnection Connection = new SqlConnection(ConnectionString);
            try
            {
                Connection.Open();
                label1.Text = "Connection OK";
            }
            catch (Exception ex)
            {
                label1.Text = ex.Message;
            }
 
            UsersDataAdapter.Fill(DataSetDBUsers, "Users");
            AccountDataAdapter.Fill(DataSetDBUsers, "Account");
            DataColumn parentColumn = DataSetDBUsers.Tables["Account"].Columns["ID_Account"]; //первичный ключ главной таблицы
            DataColumn childColumn = DataSetDBUsers.Tables["Users"].Columns["ID_Account"];    //внешний ключ подчиненной таблицы
            DataSetDBUsers.Relations.Add("UsersAndAccount", parentColumn, childColumn);
 
            BindingSource AccountBindingSource = new BindingSource(DataSetDBUsers, "Account");
            BindingSource UsersBindingSource = new BindingSource(DataSetDBUsers, "Users");
 
            BindingSource UsersAccountBindingSource = new BindingSource(AccountBindingSource, "UsersAndAccount");
 
            dataGridView1.DataSource = AccountBindingSource;
            dataGridView2.DataSource = UsersAccountBindingSource;
 }