Welcome to the Lounge

Duncan Edwards Jones wrote:

the Tinder pattern

Marc Clifton wrote:

nothing put into the dictionary ever gets garbage collected.

OriginalGriff wrote:

So I have a private constructor, a static Dictionary containing all created instances, and a static method which fetches the instance:

you create an "instance" and fill it with data // no problems
...
later fetch your "instanse" and do the work // ...wow, that went pretty quick

OriginalGriff wrote:

I hope not, I might have to stop using it ...

OriginalGriff wrote:

And it works really well. But ... is that a pattern?

public static MyClass Get(string name, List<string> data)
{
    if (!all.TryGetValue(name, out MyClass instance)
    {
        instance = new MyClass(name, data);
        all.Add(name, instance);
    }
    
    return instance;
}

private static readonly ConcurrentDictionary<string, MyClass> all = new ConcurrentDictionary<string, MyClass>(StringComparer.Ordinal);

public static MyClass Get(string name, List<string> data)
{
    return all.GetOrAdd(name, key => new MyClass(key, data));
}