非静态的字段、方法或属性“System.Windows.Forms.Form.MdiParent.get”要求对象引用

VB.NET code

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;namespace yake{    public partial class MDI_Frm : Form    {        public MDI_Frm()        {            InitializeComponent();        }        private void MDI_Frm_Load(object sender, EventArgs e)        {            Frm_left.MdiParent = Me        }    }}

上面的代码提示:
错误1非静态的字段、方法或属性“System.Windows.Forms.Form.MdiParent.get”要求对象引用D:\.NET VS2010\KouQiang VB.NET\yake\yake\MDI_Frm.cs2113yake


[解决办法]
Frm_left f=new Frm_left();