例：

static void Main(string[] args)
{
    List<ob> t = new List<ob>();
    t.Add(new ob() { name = "hello" });
    t.Add(new ob() { name = "test" });
 
    ob item = t.Where(c => c.name == "hello").First();
 
    // Changing the name of the item changes the original item in the list<>
    item.name = "burp";
 
    foreach (ob i in t)
    {
        Console.WriteLine(i.name);
    }
 
    Console.ReadLine();
}
 
public class ob
{
    public string name;
}