using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;namespace WindowsApplication2{  public partial class Form8 : Form  {    public Form8()    {      InitializeComponent();    }    private void button1_Click(object sender, EventArgs e)    {         /*LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, Color.White, Color.Red, LinearGradientMode.Horizontal);      Graphics g = this.CreateGraphics();      g.FillRectangle(brush, 1, 1, 100, 100);      g.DrawString("zhuzhao", this.Font, brush, 1, 1);*/      /*LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, Color.White, Color.Red, LinearGradientMode.Horizontal);      brush.SetBlendTriangularShape(0.5f);      Graphics g = this.CreateGraphics();      g.FillRectangle(brush, 1, 1, 1000, 100);      g.DrawString("zhuzhao", this.Font, brush, 1, 1);*/      LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, Color.White, Color.Red, LinearGradientMode.Horizontal);      brush.SetSigmaBellShape(0.5f);      Graphics g = this.CreateGraphics();      g.FillRectangle(brush, 1, 1, 1000, 100);      g.DrawString("zhuzhao", this.Font, brush, 1, 1);    }  }}