C# - Difference between Dispose and Finalize Method in C# with Example

Introduction:

Here I will explain difference between dispose and finalize methods in c#, vb.net with example or dispose() vs finalize() methods in asp.net or use of dispose and finalize methods in asp.net using c#, vb.net with example. Generally we will use dispose and finalize methods to destroy unmanaged objects.

Description:

In previous posts I explained difference between page_init and page_load events in asp.net, difference between ref and out parameters in c#, constructors in c#, vb.net with examples, delegates in c# with example, difference between throw and throw ex in asp.net, difference between len and datalength in sql server and many articles relating to interview questions, asp.net, c#.net. Now 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

//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

// Implementing Finalize method public class Sample { //At runtime destructor automatically Converted to Finalize method. ~Sample() { // your clean up code } }

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