What classes in the .NET Platform use the Singleton design pattern?

Question

What classes in the .NET Platform use the Singleton pattern?

Just want to take a look at them through Reflector and see how are implemented, and more than it, how Singleton can be used in different contexts.

score 2 · Answer 1 · answered Apr 20 '11 at 20:01

2

Pretty much where you see Provider in the name. Especially in the FormsAuthenication and Membership parts of ASP.NET.

answered Apr 20 '11 at 20:01

Daniel A. White

187,200
47
362
445

score 1 · Accepted Answer · answered Apr 20 '11 at 20:02

1

System.DBNull:

public sealed class DBNull 
{
   public static readonly DBNull Value;

   static DBNull()
   {
      Value = new DBNull();
   }

   private DBNull() {}
}

answered Apr 20 '11 at 20:02

Mark Cidade

98,437
31
224
236

score 1 · Answer 3 · answered Apr 20 '11 at 20:09

1

Definitely the Settings classes which derive from System.Configuration.ApplicationSettingsBase. Pretty much all the application/user scope settings are managed by singleton instances.

answered Apr 20 '11 at 20:09

Teoman Soygul

25,584
6
69
80

What classes in the .NET Platform use the Singleton design pattern?

3 Answers3