http://joachimvandenbogaert.wordpress.com/2009/03/26/r-and-c-on-windows/

Response.Write("找出Name='puma'的Person→ ");
Response.Write(lstPerson.Find(delegate(Person p) { return p.Name == "puma"; }).ToString() + "<p>");

//List<T>.FindAll()
//找出Age>10的數目
Response.Write("找出Age>10的數目→ ");
Response.Write(lstPerson.FindAll(delegate(Person p) { return p.Age > 10; }).Count.ToString() + "<p>");

//List<T>.Exists()
//檢查Name='F6'是否存在
Response.Write("檢查Name='F6'是否存在→ ");
Response.Write(lstPerson.Exists(delegate(Person p) { return p.Name == "F6"; }).ToString() + "<p>");

//List<T>.Sort()
//依Name升冪排序
Response.Write("<p>依Name升冪排序↑<br/>");
lstPerson.Sort(delegate(Person p1, Person p2) { return Comparer<string>.Default.Compare(p1.Name, p2.Name); });
foreach (Person p in lstPerson)
{
	Response.Write(p.ToString() + "<br/>");
}

//List<T>.Sort()
//依Name降冪排序
Response.Write("<p>依Name降冪排序↓<br/>");
lstPerson.Sort(delegate(Person p1, Person p2) { return Comparer<string>.Default.Compare(p2.Name, p1.Name); });
foreach (Person p in lstPerson)
{
	Response.Write(p.ToString() + "<br/>");
}

Ref

Here is the deep clone. Remember to add [Serializable] for class.

Ref

using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

public Class Test : IClonable
{
	public Test()
	{
	}
	// deep copy in separeate memory space
	public object Clone()
	{
		MemoryStream ms = new MemoryStream();
		BinaryFormatter bf = new BinaryFormatter();
		bf.Serialize(ms, this);
		ms.Position = 0;
		object obj = bf.Deserialize(ms);
		ms.Close();
		return obj;
	}
}

MSDN