Difference between Dispose and Finalize Method in C# with Example

Difference between Dispose and Finalize Method in C# with Example

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Here I will explain difference between dispose and finalize methods in c#, vb.net with example.

Dispose() Method:

     -  This dispose method will be used to free unmanaged resources like files, database connection etc.

     -  To clear unmanaged resources we need to write code manually to raise dispose() method.

     -  This Dispose() method belongs to IDisposable interface.

     -  If we need to implement this method for any custom classes we need to inherit the class from IDisposable interface.

     -  It will not show any effect on performance of website and we can use this method whenever we want to free objects immediately.

Example of Dispose:

//Implement Dispose Method.

public class TestDispose : IDisposable

{

private bool disposed = false;

//Implement IDisposable.

public void Dispose()

{

Dispose(true);

}

protected virtual void Dispose(bool disposing)

{

if (!disposed)

{

if (disposing)

{

// clean unmanged objects

}

// clean unmanaged objects).

disposed = true;

}

}

}

Finalize() Method:

     -  This method also free unmanaged resources like database connections, files etc…

     -  It is automatically raised by garbage collection mechanism whenever the object goes out of scope.

     -  This method belongs to object class.

     -  We need to implement this method whenever we have unmanaged resources in our code and make sure these resources will be freed when garbage collection process done.

     -  It will show effect on performance of website and it will not suitable to free objects immediately.    

Example of Finalize: 

// implementing Finalize method

public class Sample

{

//At runtime destructor automatically converted to finalize method.

~Sample ()

{

// your clean up code

}

}

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