c sharp check if list contains
// To check if a list contains a certain value, use Contains():
// Creating an List<T> of Integers
List<int> firstlist = new List<int>();
// Adding elements to List
firstlist.Add(1);
firstlist.Add(2);
firstlist.Add(3);
firstlist.Add(4);
firstlist.Add(5);
// Checking whether 4 is present in List or not
Console.Write(firstlist.Contains(4));