c sharp中的运算符重载是什么概念呢？？望知情者替俺举个例子。谢谢！万分感激!!

"+"運算符其實也是一個函數,"+"代表的這個函數可以重載

给个例子好吗？？

msdn上的例子
// cs_keyword_operator.cs
using System;
class Fraction
{
int num, den;
public Fraction(int num, int den)
{
this.num = num;
this.den = den;
}

// overload operator +
public static Fraction operator +(Fraction a, Fraction b)
{
return new Fraction(a.num * b.den + b.num * a.den,
a.den * b.den);
}

// overload operator *
public static Fraction operator *(Fraction a, Fraction b)
{
return new Fraction(a.num * b.num, a.den * b.den);
}

// define operator double
public static implicit operator double(Fraction f)
{
return (double)f.num / f.den;
}
}

class Test
{
public static void Main()
{
Fraction a = new Fraction(1, 2);
Fraction b = new Fraction(3, 7);
Fraction c = new Fraction(2, 3);
Console.WriteLine((double)(a * b + c));
}
}

简单说，自己定义的数据类型需要进行特定的运算时，就要重载运算符。
比如有一个人的类，需要比较人的年龄大小就需要了。

public class person(string thename,int theage)
{
name = thename;
age = theage;
}
...
...
public static bool operator > (person p1,person p2)
{
if(p1.age > p2.age )
return true;
else
return false;
}