Why do we need Destructor when we have Garbage collector.c#

Hemalatha Sunnapu

8y1.4kC#

Garabge collector does the automatic collection and why do we need to specify externally a destructor.

And what is destructor and use of destructor.

11 Replies

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Karthik Chintala8y ago
Accepted answer
I hope you have the knowledge of what a managed and unmanaged resource is.

Yes, the garbage collector does the automatic collection. But, GC just collects only the managed objects which are not reachable.

And it is not mandatory to specify the destructor all the time in your classes and even it is not recommended to always have a destructor. So, just don't use it unless you need it.

check this out (on when to use destructors)

http://blog.stephencleary.com/2009/08/how-to-implement-idisposable-and.html

Destructor
Used to destruct the instance of class (the opposite of construction)
When to use?
A destructor should only be used when your class uses expensive unmanaged resources that must be cleaned up when your object goes away.

It is recommended to use the destructor with IDisposable pattern.
Hemalatha Sunnapu8y ago
Do you know why extension method should be in static class?
Karthik Chintala8y ago
If it answers your question. Please mark it as answer
Hemalatha Sunnapu8y ago
Hi Karthik,
Thankyou for your answer and the fanatastic link .
Really the information in link is good .
Nikunj Satasiya8y ago
Hi Hemlatha,
You shoud Visit this given link for more information regarding singleton. I hopw it's helps you.

https://www.c-sharpcorner.com/article/singleton/
Hemalatha Sunnapu8y ago
Yaa ok nikunj,
Thankyou very much.
What is the main use of singleton pattern?
Nikunj Satasiya8y ago
Still have any doubt regarding this ? feel free to ask me if you have any questions.
Hemalatha Sunnapu8y ago
Ok , Thank you very much
Nikunj Satasiya8y ago
Hemlatha i mean every objects that you have defined within your class i am not talling not for only singal please try to understand what i m trying to say.
Hemalatha Sunnapu8y ago
Hi Nikunj,

Thank you for your answer.

As you have said that "methods contains a code of clean up for the particular object."
How can you say it particular object as we don't specify anything like that in that destructor method even implicitly.
Nikunj Satasiya8y ago
Hello Hemalatha,

You want to know about destructor so up to my knowladge destructor is a special methods that methods contains a code of clean up for the particular object.

You can not call them explicitly in your source code as they are called implicitly bythe garbage collector.

If i can say then in C# they have same name as the name of class name witch is preceded by the sign like "~".

Look this code example for demonstration purpose
class ExampleClass
{
    public ExampleClass()
    {
    }
    ~ExampleClass()
    {
    }
}
I Hope this may helpful.

Why do we need Destructor when we have Garbage collector.c#

Destructor

When to use?