Singleton Class in C#

1 public sealed class SingletonClass
2 {
3 private SingletonClass()
4 {
5 }
6
7 private static SingletonClass instance = new SingletonClass();
8
9 public static SingletonClass Instance
10 {
11 get
12 {
13 if(instance == null)
14 {
15 instance = new SingletonClass();
16 return instance;
17 }
18 else
19 return instance;
20 }
21 }
22 }