Object Instantiation in C# Programming

Praveen Kumar

Object Instantiation in C# Programming

I have a class Greet and I am creating a object of this class by following two ways. Could you suggest me, which one is best way or both are same from the memory allocation point of view.

Kindly suggest the answer from the memory allocation point of view

class Greet
{
public string SayHello()
{
return "Hello Praveen";
}
}

static void Main(string[] args)
{
string message = "";
//1. First Way
Greet greet = new Greet();
message=greet.SayHello();
//1. Second Way
message =new Greet().SayHello();
}

3 Replies

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Sivasankar Gorantla9y ago
Accepted answer
Hi,

In memory allocation point of view, both of them are same. CLR is going to execute statements from left to right.

1st Scenario:

1. CLR reads first statement and creates object in memory.
2. CLR reads metadata of Greet method and gets the details of SayHello method.
3. As this method is part of Greet class, it is legal to call. Now CLR will call SayHello method.
Greet greet = new Greet();
message=greet.SayHello();
2nd Scenario:
1. Even though you see it as one statement, for compiler it is not one. It is two.

2. What you need to understand here is, it is just syntactical sugar.

3. When this statement gets compiled, it is going to divided into two statements like above.

4. Same IL code gets generated for both of these scenarios.

5. Same steps will be performed as mentioned in scenario 1.
message =new Greet().SayHello();
Conclusion: Both of the statements are same in terms of memory allocation.

Thanks,
Siva
+1
Praveen Kumar9y ago
Thank you Siva
0
ali tuncer9y ago
I believe second way syntax was introduced in C#3.0, they should be the same..
+1