list with identifier c# code example
Example: c# object is in object list
public class A { public int Id {get;set;} public A() {} public A(int id) {Id = id;}}
List<A> list = new List<A>() { new A() { Id = 1}, new A() { Id = 2}};
bool containsItem = list.Any(item => item.Id == 3);
// this would return false.