Binzy&Jasmin

 using System;
 using System.IO;
 using System.Windows.Forms;
 using System.Text;
 public class TextBoxWriter : TextWriter // 继承自TextWriter 
 {
  private TextBoxBase textBox;
       
  public TextBoxWriter(TextBox textBox)
  {
   this.textBox = textBox;
  }
       

  public override void Write(char c)
  {
   Write( c.ToString() );
  }

  public override void Write(String s)
  {
   AppendText( s );
  }

  private void AppendText( string s )
  {
   textBox.AppendText( s );
  }

  public override Encoding Encoding
  {
   get { return Encoding.Default; }
  }

  public override void WriteLine(string s)
  {
   Write( s + "\r\n" );
  }
 }

 using System;
 using Cramon.NetExtension.DynamicProxy;
 using System.Reflection;
 public class Biz
 {

  // 这里使用了DynamicProxy.NET来创建动态代理.
  private static ILog log = (ILog) DynamicProxyFactory.Instance.CreateProxy(LogFactory.GetInstance(), new InvocationDelegate(InvocationHandler));

  private static object InvocationHandler(object target, MethodBase method, object[] parameters)
  {
   foreach(object obj in parameters)
   {
    Console.WriteLine( DateTime.Now.ToString("yyyy-MM-dd HH:mms") + " " + obj.ToString());
   }
   object result = method.Invoke(target, parameters);
   return result;
  } 

  public void Test()
  {
   log.foo("I am a Pig");
  }
 }

  private void button1_Click(object sender, System.EventArgs e)
  {
   TextBoxWriter writer = new TextBoxWriter(this.textBox1);
   Console.SetOut(writer);
   Biz biz = new Biz();
   biz.Test();
  }