NullReferenceException qui n'a pas été gérée

Ce code :

Code:

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public class Store
    {
        public Album[] albums ;
        public Client[] clients;
        public CreditCard[] creditC;
        public Store()
        {
 
            albums = new Album[5];
            clients = new Client[5];
            creditC = new CreditCard[5];
            int i = albums.Length;
            albums[0].id = 1; albums[0].name = "xxx"; albums[0].avQty = 10; albums[0].unitPrice = 1500;
            albums[1].id = 2; albums[1].name = "yyy"; albums[1].avQty = 10; albums[1].unitPrice = 1500;
            albums[2].id = 3; albums[2].name = "zzz"; albums[2].avQty = 10; albums[2].unitPrice = 1500;
            albums[3].id = 4; albums[3].name = "aaa"; albums[3].avQty = 10; albums[3].unitPrice = 1500;
            albums[4].id = 5; albums[4].name = "ddd"; albums[4].avQty = 10; albums[4].unitPrice = 1500;
 
        }
}

me génère une erreur de type NullReferenceException