类排序

class person :IComparable<person>
{
public person(string name, string sex)
{
this.name = name;
this.sex = sex;
}
public string name{set;get;}
public string sex {set;get; }

public int CompareTo(person other)
{
if (other == null) throw new ArgumentNullException("other");
int result = this.name.CompareTo(other.name);
if (result == 0)
{
result = this.sex.CompareTo(other.sex);
}
return result;
}

public override string ToString()
{
return name + ":" + sex;
}
}

调用

person[] p = { new person("小明", "女"), new person("明红", "男"), new person("小明", "男") };
Array.Sort(p);
foreach (var item in p)
{
Console.WriteLine(item.ToString());
}

 或者

IEnumerator enumerator = p.GetEnumerator();
while (enumerator.MoveNext())
{
person p9 = (person)enumerator.Current;
Console.WriteLine(p9.ToString());
}

System.String和System.Int32实现IComparable接口，所以Array只能对他们两进行排序

而如果数组中的元素是类的话，就要重写CompareTo(person other)方法