来自c#初学者的求救！！！！ 十万火急！！！！！

大家帮我看看下面的代码出了什么问题？谢谢谢谢！！！！
我的e-mail:seal_zhong@yahoo.com.cn

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Windows.Forms;

namespace the_frist
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button dis;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
this.dis = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// dis
//
this.dis.Location = new System.Drawing.Point(344, 560);
this.dis.Name = "dis";
this.dis.Size = new System.Drawing.Size(96, 24);
this.dis.TabIndex = 0;
this.dis.Text = "隐藏";
this.dis.Click += new System.EventHandler(this.dis_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(800, 597);
this.Controls.Add(this.dis);
this.ForeColor = System.Drawing.SystemColors.ControlText;
this.Name = "Form1";
this.Text = "镇巴县城全景";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Paint(object sender, System.Forms.PaintEventArgs e)
{
Graphics g=e.Graphics;
Color FColor=Color.Blue;
Color FColor=Color.Yellow;
Color FColor=Color.Red;
Color FColor=Color.Green;
Brush b =new LinearGradientBrush(this.ClientRectangle,FColor,
TColor,LinearGradientMode.ForwardDiagonal);
g.FillRectangle(b,this.ClientRectangle);
}

private void Form1_Resize(object sender,System.EventArgs e)
{
this.Invalidate();
}

private void dis_Click(object sender, System.EventArgs e)
{
Form1.ActiveForm.Hide();
}

private void Form1_Load(object sender, System.EventArgs e)
{

}
}
}