How to make a variable availabe across an application in winform?

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1. I have an application with two dlls (say dll_one,dll_two).
2. dll_One is refered in dll_two
3. The dll_two does some process and a calculated value is made available in a variable say 'Var_Dll_2"
4. When i access dll_one's object from winform , the variable 'Var_Dll_2" should be availabe in dll_one too.

How to achieve this?Please suggest a solution

Posted 5-Feb-15 7:22am

P.Gnanaraj

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**Zoltán Zörgő** · Accepted Answer · 2015-02-05T07:41:00

Don't tray to share variables, share values or objects.
There are several approaches:
1) Any assambly (forget classic dll concept in .net), can define as many classes as you want. So define a static class with a static property and use it to share the value or object. Still, this is not a good approach for many reasons.
2) You can pass parameters to methods by reference (this is default for objects).
3) You can pass parameters by value (scalars) and get results from functions.
Please note, that not the variable itself is interesting, since it is holding only a reference to the value (if it is an object) - but the refernce itself. You can keep as many references to an object as you want. Thus any object can hold a reference to any object, and any method having that reference will be able to change or read that object, indifferent of what the variable is. And does not matter how do you distruburte your classes around assamblies.