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28 Ιαν 2010 · 154. A singleton is a class which only allows one instance of itself to be created - and gives simple, easy access to said instance. The singleton premise is a pattern across software development. There is a C# implementation "Implementing the Singleton Pattern in C#" covering most of what you need to know - including some good advice regarding ...
25 Φεβ 2018 · 16. A singleton should be used when managing access to a resource which is shared by the entire application, and it would be destructive to potentially have multiple instances of the same class. Making sure that access to shared resources thread safe is one very good example of where this kind of pattern can be vital.
9 Απρ 2009 · Jon Skeet, THE_SKEET, has a great article exemplifying various ways to implement correctly (Thread safe, lazy, performant) the Singleton pattern. Go read it here. Archived Link. By popular demand, I reproduce the Skeet version:
7 Σεπ 2012 · So to avoid the lock first we need to check the null value. This is also thread safe and it is the best way to achieve the best performance. Please have a look at the following code. public sealed class Singleton. {. private static readonly object Instancelock = new object(); private Singleton() {. }
6 Φεβ 2009 · 399. Singleton objects are stored in the heap, but static objects are stored in the stack. We can clone a singleton object as long as the designer allows it, but we cannot clone a static class object. Singleton classes follow object-oriented programming (OOP) principles; static classes do not.
30 Νοε 2012 · I have created an singleton class, this class returns a database connection. So my question is this connection is also satisfying singleton criteria? If no, than how I can make it singleton. Here i...
52. Typically a singleton isn't a static class - a singleton will give you a single instance of a class. I don't know what examples you've seen, but usually the singleton pattern can be really simple in C#: public sealed class Singleton. {. private static readonly Singleton instance = new Singleton(); static Singleton() {} // Make sure it's ...
36. A Singleton with parameters smells fishy to me. Consider whateva's answer and the following code: Singleton x = Singleton.getInstance("hello", "world"); Singleton y = Singleton.getInstance("foo", "bar"); Obviously, x==y and y works with x's creation parameters, while y's creation parameters are simply ignored.
25 Μαΐ 2010 · Paraphrased from C# in Depth: There are various different ways of implementing the singleton pattern in C#, from Not thread-safe to a fully lazily-loaded, thread-safe, simple and highly performant version.
To register / consume a type configured as a singleton in autofac you would do something like the following: var builder = new ContainerBuilder() builder.Register(typeof(Dependency)).SingletonScoped() builder.Register(c => new RequiresDependency(c.Resolve<Dependency>())) var container = builder.Build();
