【vb.net 2005】各位帮我看看我的代码为什么错,要怎么改....

Imports System.Threading
Public Class ThreadTest
Public i, j As Integer
Public Sub Method1()
For j = 1 To 10000
Thread.Sleep(1)
TextBox2.Text = 10000 - j
TreeView1.Nodes.Add(j)
Next
End Sub
Public Sub Method2()
For i = 1 To 10000
Thread.Sleep(1)
TextBox1.Text = i
ListBox1.Items.Add(i)
Next
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim th1 As New Thread(New ThreadStart(AddressOf Method1))
th1.Start()
Dim th2 As New Thread(New ThreadStart(AddressOf Method2))
th2.Start()
End Sub

Private Sub ThreadTest_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Control.CheckForIllegalCrossThreadCalls = False
End Sub
End Class

错误出现在TreeView1.Nodes.Add(j)句

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