Dictionary.ContainsKey return False, but a want True

Question

namespace Dic
{
public class Key
{
    string name;
    public Key(string n) { name = n; }
}

class Program
{
    static string Test()
    {
        Key a = new Key(         


        

Answer 1

you problem is that

new Key("A").Equals(new Key("A"))==false.

and

new Key("A").GetHashCode()!=new Key("A").GetHashCode()

fix that and it should work I think. To fix it override the Equals method and check if the name values are the same. You should also override GetHashCode if you are overriding Equals.