你能用lambda表达式创建一个简单的'EqualityComparer <T>'

using System;

public class CustomEqualityComparer : EqualityComparer<int>
{
    public override bool Equals(int x, int y)
    {
        return x == y;
    }

    public override int GetHashCode(int obj)
    {
        return obj.GetHashCode();
    }
}

using System;

public class Program
{
    public static void Main()
    {
        IEqualityComparer<int> customEqualityComparer = new CustomEqualityComparer();

        // 使用 Lambda 表达式创建一个简单的 EqualityComparer<T>
        IEqualityComparer<int> lambdaEqualityComparer = EqualityComparer<int>.Create(
            (x, y) => x == y,
            obj => obj.GetHashCode()
        );

        int a = 1;
        int b = 2;

        // 使用自定义的 EqualityComparer<T> 比较两个整数
        bool areEqual = customEqualityComparer.Equals(a, b);
        Console.WriteLine($"Are {a} and {b} equal using custom comparer? {areEqual}");

        // 使用 Lambda 表达式创建的 EqualityComparer<T> 比较两个整数
        areEqual = lambdaEqualityComparer.Equals(a, b);
        Console.WriteLine($"Are {a} and {b} equal using lambda comparer? {areEqual}");
    }
}