C# と VB.NET の質問掲示板

さて、static の 2 引数採る operator を書かないといけないと思います。

// C++/CLI
namespace ClassLib {

	public ref class TestClass
	{
	public:
		TestClass() { }

		property int a;
		property int b;
		property int c;

		static bool operator ==(TestClass^ left, TestClass^ right)
		{
			if (Object::ReferenceEquals(left, right)) return true;
			if (Object::ReferenceEquals(left, nullptr)) return false;
			if (Object::ReferenceEquals(right, nullptr)) return false;
			return (left->a == right->a && left->b == right->b && left->c == right->c);
		}
	};
}

// C# 
static void Main(string[] args)
{
    TestClass c1 = new TestClass { a = 1, b = 2, c = 3};
    TestClass c2 = new TestClass { a = 1, b = 2, c = 3};
    Console.WriteLine("c1 == c2? {0}", c1 == c2);
}

// 出力結果
c1 == c2? True