编辑“︁C Sharp 运算符重载”︁（章节）

== 语法与实现 ==
运算符重载通过定义类的静态方法来实现，方法名使用<code>operator</code>关键字后跟要重载的运算符符号。方法的参数和返回类型决定了运算符的行为。

以下是一个简单的示例，展示如何为自定义的<code>Vector</code>类重载<code>+</code>运算符：

<syntaxhighlight lang="csharp">
public class Vector
{
    public int X { get; set; }
    public int Y { get; set; }

    public Vector(int x, int y)
    {
        X = x;
        Y = y;
    }

    // 重载 + 运算符
    public static Vector operator +(Vector v1, Vector v2)
    {
        return new Vector(v1.X + v2.X, v1.Y + v2.Y);
    }

    // 重载 == 运算符（必须同时重载 !=）
    public static bool operator ==(Vector v1, Vector v2)
    {
        return v1.X == v2.X && v1.Y == v2.Y;
    }

    public static bool operator !=(Vector v1, Vector v2)
    {
        return !(v1 == v2);
    }

    // 重写 Equals 和 GetHashCode 以确保一致性
    public override bool Equals(object obj)
    {
        if (obj is Vector other)
            return this == other;
        return false;
    }

    public override int GetHashCode()
    {
        return X.GetHashCode() ^ Y.GetHashCode();
    }
}
</syntaxhighlight>

=== 示例输入与输出 ===
<syntaxhighlight lang="csharp">
Vector v1 = new Vector(1, 2);
Vector v2 = new Vector(3, 4);
Vector sum = v1 + v2;  // 调用重载的 + 运算符
Console.WriteLine($"Sum: ({sum.X}, {sum.Y})"); // 输出: Sum: (4, 6)

bool areEqual = v1 == v2;
Console.WriteLine($"Are equal? {areEqual}"); // 输出: Are equal? False
</syntaxhighlight>