请大哥们帮解释一下下，C#中一行代码，小弟看不懂！IComparer接口,集合

Question

public class PersonComparerName : IComparer
{
public static IComparer Default = new PersonComparerName();//这一行看不懂

public int Compare(object x, object y)
{
if (x is Person && y is Person)
{
return Comparer.Default.Compare(((Person)x).Name, ((Person)y).Name);
}
else
{
throw new ArgumentException(".....");
}
}
}

Answer 1

创建一个 PersonCmparerName 的静态实例。严格的写法应该是：public static readonly IComparer Default = new PersonComparerName();//这一行看不懂我猜测他想实现 PersonComparerName 的单例模式。