IRepository<T>.cs

public interface IRepository<T, in K> : IDisposable where T:class 
    {
        IQueryable<T> All { get; }
        IQueryable<T> AllAndExpand(params Expression<Func<T, object>>[] entity);
        T Find(K id);
        void InsertOrUpdate(T item);
        void Delete(K id);
        void Save();
    }