Distinct not working with LINQ to Objects

Question

class Program
{
    static void Main(string[] args)
    {
        List books = new List 
        {
            new Book
            {
                


        

Answer 1

There is one more way to get distinct values from list of user defined data type:

YourList.GroupBy(i => i.Id).Select(i => i.FirstOrDefault()).ToList();

Surely, it will give distinct set of data