在存储库模式中按TKey查找实体<T,TKey>

与 Repository Pattern ,我正在尝试通过 TKey . 我想找到比较的方法 具有 int

public interface IRepository<T, TKey>
{
    T GetById(TKey id);
}

public class Repository<T, TKey> : IRepository<T, TKey> where T : class, IEntity<TKey>
{
    private List<T> _context;

    public Repository(List<T> context)
    {
        _context = context;
    }

    public T GetById(TKey id)
    {
        return _context.Single(m => m.Id == (TKey)id);
    }
}

对于 TKey键

public interface IEntity<TKey>
{
    TKey Id { get; set; }
}

public class TestEntity : IEntity<int>
{
    public int Id { get; set; }

    public string EntityName { get; set; }
}

var list = new List<TestEntity>();

list.Add(new TestEntity{ Id = 1 , EntityName = "aaa" });
list.Add(new TestEntity{ Id = 2 , EntityName = "bbb" });

var repo = new Repository<TestEntity, int>(list);
var item = repo.GetById(1);

Console.WriteLine(item);

我可能不是在正确的方向与铸造下面的方式,但尝试和运行错误。

public T GetById(TKey id)
{
    return _context.Single(m => (object)m.Id == Convert.ChangeType(id, typeof(TKey));
}

[System.InvalidOperationException:序列不包含匹配元素]

如何在不改变 TKey id 到 Expression<Func<T, bool>> predicate