方法一：

 this.listBox1.SelectedIndex =  this.listBox1.Items.Count - 1;

方法二：

this.listBox1.TopIndex = this.listBox1.Items.Count - (int)(this.listBox1.Height / this.listBox1.ItemHeight);

 

方法三：

using System.Runtime.InteropServices;

[DllImport("User32.dll")]

private static extern Int32 SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

public const int WM_VSCROLL = 0x0115;

public const int SB_BOTTOM = 7;

SendMessage(listBox1.Handle, WM_VSCROLL, SB_LINEDOWN, 0);

 

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如果是WPF程序，可以用任意位置跳转方法：

listBox1.ScrollIntoView(listBox1.Items[0]);