Final, Finally, Finalize or Sealed?

Final access modifier

• Final can be used for classes, methods, and variables
• Final variables can't change from the initialized values
• Final classes can't be subclassed
• Final methods can't be overriden
• C# uses the keyword "sealed" instead of "final" for classes and methods
• A class or method can be "sealed"
• A "const" may be used for equivalent of a "final" variable

Finally block

• Finally is used in exception handling
• Finally is a part of the try-catch-finally
• Finally is executed even if no exception is thrown
• Read more on finally in this post

Finalize() method

• Finalize() is a non-explicit way to clean up resources
• Memory resourses for the object are cleaned up using Finalize()
• Finalize() is called during garbage collection to allow objects to clean up unmanaged resources
• Finalize() should always be protected
• Finalize() should release unmanaged resources only