LINQ - Get distinct values from collection

Below Code snippet shows how to select distinct values from generic collection using LINQ

public class Student
{
public int ID { get; set; }
public string Name { get; set; }
public int Age { get; set; }
}

List students = new List();
students.Add(new Student { ID = 1, Name = "Adam", Age = 15 });
students.Add(new Student { ID = 2, Name = "Tom", Age = 15 });
students.Add(new Student { ID = 3, Name = "John", Age = 15 });
students.Add(new Student { ID = 4, Name = "Abraham", Age = 15 });
students.Add(new Student { ID = 5, Name = "Abraham", Age = 15 });


/*Find students having same name*/
var samename = students.GroupBy(x => x.Name).Where(g => g.Count() > 1).Select(y => new { Code = y.Key, Desc = y.First() }).ToDictionary(z => z.Code, z => z.Desc);


/*Select distinct name of students*/
var distinctnames = students.GroupBy(x => x.Name).Where(g => g.Count() >0).Select(y => new { Code = y.Key, Desc = y.First() }).ToDictionary(z => z.Code, z => z.Desc);