.NET (Core and Framework)

95003940022-Dec-12 17:09

2-Dec-12 17:09

I want to allow the class to create only one object instance.
I want to make visible the class ouside the assembly but restrict to only one assembly.
What needs to do?
Please suggest me.

Re: OOPS concepts in c#

Richard MacCutchan2-Dec-12 21:43

Richard MacCutchan

2-Dec-12 21:43

Take a look at the Singleton pattern[^].

One of these days I'm going to think of a really clever signature.

Re: OOPS concepts in c#

Eddy Vluggen3-Dec-12 1:00

Eddy Vluggen

3-Dec-12 1:00

What does this have to do with OOPS concepts? What you are describing is such a basic request that it's part of the framework; we call them "static classes".

public static class MySingleObjectClass
{
  public static void PerformSomeAction()
  { 
  }
}

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If you can't read my code, try converting it here[^]
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Re: OOPS concepts in c#

95003940023-Dec-12 1:49

9500394002

3-Dec-12 1:49

If we create static class , we cannot able to create instance. but ,my query is that instance should be created only one time and restrict to more than one.

Re: OOPS concepts in c#

Eddy Vluggen3-Dec-12 3:17

Eddy Vluggen

3-Dec-12 3:17

9500394002 wrote:
If we create static class , we cannot able to create instance.

There's one instance by definition, so no use in creating it.

9500394002 wrote:
but ,my query is that instance should be created only one time and restrict to more than one.

That's exactly what the static class was intended for.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
They hate us for our freedom![^]

Re: OOPS concepts in c#

Pete O'Hanlon3-Dec-12 1:58

Pete O'Hanlon

3-Dec-12 1:58

If you want to restrict the class so that it can only be seen by one particular external assembly, you use internal to limit the scope to the current assembly, and then you implement InternalsVisibleTo[^] to link this to the specific assembly.

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Re: OOPS concepts in c#

95003940023-Dec-12 2:07

9500394002

3-Dec-12 2:07

Are you suggesting InternalVisible to be used in the parent class?
Up to my knowledge InternalVisible access modifier is not there in c#

Re: OOPS concepts in c#

Pete O'Hanlon3-Dec-12 2:10

Pete O'Hanlon

3-Dec-12 2:10