is there any best practice to create singleton class

Deepika

6y867Learn iOS Programming

best to to create singleton pattern

4 Replies

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Ashutosh Gupta6y ago
Accepted answer
singleton itself a pattern, what are you looking for?
i can help you to create singleton class if you are looking for
public class MySingletonClass
    {
        private static readonly Lazy LazyObject =
            new Lazy(() => new MySingletonClass());

        private MySingletonClass() { // Do cons work here }

        public static MySingletonClass Instance => LazyObject.Value;

        public void Dowork() { }
}

then use as MySingletonClass.Instance.Dowork();
Deepika6y ago
Thanks all.. ashutosh will use your solution
Rajanikant Hawaldar6y ago
Hi Deepika, I think you may be beginer, you need to hhen class should be sealed for singleton pattern, Why constructor should be private for singleton pattern. please go through KUD Venkat videos from youtube, below is the link to understand these concepts.
https://www.youtube.com/playlist?list=PL6n9fhu94yhUbctIoxoVTrklN3LMwTCmd

Agree with @Ashutosh Gupta.
@Avinash Kumar : add one more null check before lock that is more safe.
Avnish Kumar6y ago
It's a best practice to use a thread-safe singleton class
public sealed class Singleton
  {
      private static Singleton _instance = null;
      private static readonly object _padlock = new object();
      Singleton() { }
      public static Singleton Instance
      {
          get
          {
              lock (_padlock)
              {
                  if (_instance == null)
                  {
                      _instance = new Singleton();
                  }
                  return _instance;
              }
          }
      }
  }