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I need to force the use of "using" to dispose a new instance of a class.
public class MyClass : IDisposable { ... } using(MyClass obj = new MyClass()) // Force to use "using" { } 
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DO implement the IDisposable interface by simply calling Dispose(true) followed by GC. SuppressFinalize(this). DO NOT make the parameterless Dispose method virtual. DO NOT declare any overloads of the Dispose method other than Dispose() and Dispose(bool).
These classes need to dispose of these objects. I created a virtual Dispose method in the base ScreenObject base class and then implemented an override Dispose method in each of the derived classes that hold onto unmanaged resources.
The dispose pattern is used for objects that implement the IDisposable interface, and is common when interacting with file and pipe handles, registry handles, wait handles, or pointers to blocks of unmanaged memory. This is because the garbage collector is unable to reclaim unmanaged objects.
Dispose() should call Dispose(true) , and the finalizer should call Dispose(false) . If you create an unsealed type that declares and implements the IDisposable interface, you must define Dispose(bool) and call it.
The fact that you need to ensure that the object is disposed indicates a design flaw. It's fine if disposing is the polite or efficient thing to do, but it should not be semantically necessary.
There is no way to enforce that an object is disposed of via the using statement. However, what you can do is maintain a flag in the object that indicates whether the object was disposed or not, and then write a finalizer that checks that flag. If the finalizer detects that the object wasn't disposed, then you can have the finalizer, say, terminate the process via failfast. That is, so severely punish the user who neglected to dispose the object that they are forced to either fix their bug or stop using your object.
That doesn't strike me as nice, good, or polite, but you're the only one who knows what the terrible, terrible consequences are of failing to dispose the object. Whether applying a punishment to people who fail to follow your crazy rules is better than living with the consequences of them failing to follow the rules is for you to decide.
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