Nieprawidłowa składnia w pobliżu słowa kluczowego „użytkownik”

using System; 

using System.Collections.Generic; 

using System.ComponentModel; 

using System.Data; 

using System.Drawing; 

using System.Linq; 

using System.Text; 

using System.Windows.Forms; 

using System.Data.SqlClient; namespace WindowsFormsApplication1 

{ 

 public partial class Form1 : Form 

 { 

 SqlConnection conn; 

 SqlDataAdapter GameDA; 

 SqlDataAdapter DetailDA; 

 DataSet DetailDS; 

 SqlCommandBuilder cmdBuilder; 

 SqlDataAdapter UserDA; 

 SqlDataAdapter AdministratorDA; 

 SqlDataAdapter OrderDA; 

 DataSet OrderDS; 

 SqlCommandBuilder cmdBuilder2;  public Form1()

 {

 InitializeComponent();

 conn = new SqlConnection("Data Source=HOME-AC284121FE\\SQLEXPRESS;Initial Catalog=GameShop;Integrated Security=SSPI;");

 SqlCommand command1 = new SqlCommand("SELECT * FROM Game", conn);

 GameDA = new SqlDataAdapter(command1);

 SqlCommand command2 = new SqlCommand("SELECT * FROM Detail WHERE GameID = @GameID", conn);

 command2.Parameters.Add(new SqlParameter("@GameID", SqlDbType.Int));

 DetailDA = new SqlDataAdapter(command2);

 SqlCommand command3 = new SqlCommand("SELECT * FROM Administrator", conn);

 AdministratorDA = new SqlDataAdapter(command3);

 SqlCommand command4 = new SqlCommand("SELECT * FROM User", conn);

 UserDA = new SqlDataAdapter(command4);

 SqlCommand command5 = new SqlCommand("SELECT * FROM Order WHERE UserID = @UserID", conn);

 command5.Parameters.Add(new SqlParameter("@UserID", SqlDbType.Int));

 OrderDA = new SqlDataAdapter(command5);

 cmdBuilder2 = new SqlCommandBuilder(OrderDA);

 cmdBuilder = new SqlCommandBuilder(DetailDA);

 } private void Form1_Load(object sender, EventArgs e)

 {

 DetailDS = new DataSet();

 OrderDS = new DataSet(); GameDA.Fill(DetailDS, "Game");

 **UserDA.Fill(OrderDS, "User");// <-- Error**

 AdministratorDA.Fill(OrderDS, "Administrator"); comboBoxGame.DisplayMember = "Name";

 comboBoxGame.ValueMember = "GameID";

 comboBoxGame.DataSource = DetailDS.Tables["Game"]; dataGridView.DataSource = DetailDS.Tables["Detail"];

 dataGridView.Columns["GameID"].Visible = false;

 dataGridView.Columns["DetailID"].Visible = false;

 } private void comboBoxGame_SelectedIndexChanged(object sender, EventArgs e)

 {

 if (comboBoxGame.SelectedValue != null)

 if (DetailDS.Tables.Contains("Detail"))

 {

 DetailDS.Tables["Detail"].Clear();

 }

 DetailDA.SelectCommand.Parameters[0].Value = comboBoxGame.SelectedValue;

 DetailDA.Fill(DetailDS, "Detail");

 } private void buttonExit_Click(object sender, EventArgs e)

 {

 this.Close();

 } }

}