<Window x:Class="MyWPFApp.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="MainWindow" Height="70" Width="250" Loaded="Window_Loaded"><Grid><TextBlock Height="36" HorizontalAlignment="Left"  Name="gc" Text="不问你是谁只是沉醉!" VerticalAlignment="Top" Width="230" FontSize="24"><TextBlock.Foreground><LinearGradientBrush> <GradientStop Color="Green"></GradientStop><GradientStop x:Name="gcc1"  Color="Green" Offset="0.3"></GradientStop><GradientStop x:Name="gcc2" Color="Blue" Offset="0.3"></GradientStop><GradientStop Color="Blue" Offset="1"></GradientStop> </LinearGradientBrush></TextBlock.Foreground></TextBlock></Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes; namespace MyWPFApp
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();}private void Window_Loaded(object sender, RoutedEventArgs e){System.Timers.Timer t = new System.Timers.Timer(200);//实例化Timer类，设置间隔时间为200毫秒；   t.Elapsed += new System.Timers.ElapsedEventHandler(theout);  //到达时间的时候执行事件； t.AutoReset = true;//设置是执行一次（false）还是一直执行(true)；    t.Enabled = true;  //是否执行System.Timers.Timer.Elapsed事件；  ,调用start()方法也可以将其设置为true  }public void theout(object source, System.Timers.ElapsedEventArgs e){ }}
}

委托的使用

public void theout(object source, System.Timers.ElapsedEventArgs e){this.gcc1.Dispatcher.Invoke(new Action(delegate{if (this.gcc1.Offset < 1){this.gcc1.Offset += 0.1;}else{this.gcc1.Offset = 0;}}));this.gcc2.Dispatcher.Invoke(new Action(delegate{if (this.gcc2.Offset < 1){this.gcc2.Offset += 0.1;}else{this.gcc2.Offset = 0;}})); }