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c# local variable lazy initialization

Posted on 2012-03-28
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Last Modified: 2012-04-02
can someone tell me the pros and cons of lazy initializing local variables?  my main concern about using this technique is that there is always the possibility that a variable doesn't get lazy initialized because it's being used in a whole bunch of places.  so as opposed to writing lazy initialization code in multiple places possibly, why not just initialize it the moment you declare it.
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Question by:mmingfeilam
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käµfm³d   👽 earned 1500 total points
ID: 37780207
I'll have to defer for the "cons", but regarding this statement: " so as opposed to writing lazy initialization code in multiple places possibly"...

I would say that if you are duplicating your "lazy initialization" code in multiple places, then you are probably doing something wrong. Lazy initialization just means that you don't instantiate something until you need it. For local variables, I would wonder under what circumstances you were contemplating lazy initialization. If you have a lengthy function, then it may be the case that your function requires refactoring anyway. If you have a normal function, then any expensive-to-create objects which you have declared locally I would expect to have been coded in such a manner that you really wouldn't need lazy initialization--but I'm rather sleepy, so I'm sure I could be overlooking something.

From what I am reading, lazy initialization is akin to the Singleton pattern. I would inquire as to whether or not a pattern like that would suit your environment.
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by:mmingfeilam
ID: 37784695
what i mean by lazy init is this:

MyClass var = null;

...
if(condition1)
  var = new MyClass();
else if(condition2)
...
else if(condition3)
  var = new MyClass();
else
 ...
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