using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string[] a = { "a", "b", "c", "d" };
var b = a.SingleOrDefault(c => c.Equals("b"));
b = "hello world";
if (a[1] == "hello world")
{
Console.Out.WriteLine("true");
}
else
{
Console.Out.WriteLine("false");
}
Console.ReadLine();
List<Person> allPersons = new List<Person>{
new Person{ Name="Jack"},
new Person{ Name="Crystal"}
};
Person p=new Person();
p = allPersons.SingleOrDefault(c => c.Name == "Crystal");
p.Name = "Tom";
foreach (var item in allPersons)
{
Console.Out.WriteLine(item.Name);
}
Console.ReadLine();
}
}
public class Person
{
public string Name { get; set; }
}
}
结果: