在下刚学C#，用VS2008写一个项目时，窗体之间需要跳转，但我实现不了，错误是：“非静态的字段、方法或属性“System.Windows.Forms.Control.Show()”要求对象引用”，错误的地方已在代码里注明。
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;



namespace Fruits
{
    public partial class frmXuanze : Form
    {
        public frmXuanze()
        {
            InitializeComponent();
        }

        private void btnGly_Click(object sender, EventArgs e)
        {
            if (TextInput())
            {
                frmDelu frmdelu = new frmDelu();
                frmDelu.Show();               //错误在此处
                this.Visible = false;
            }
        }
        private bool TextInput()
        {
            return true;
        }

        private void btnTuichu_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}