scope - With... End With vs Using in VB.NET -

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I just found out that like C #, VB Using in the keyword is the keyword.

By now I thought that I do not have it (I'm stupid, I know ...) and instead of these things were: 

  New allayback connection   
 with such a definition (what is the implication) by using the statement  this way   
  Use CN  Update   
 I should say that I am familiar with the statement using   when it is disposed of that object Tax Received when construction is finished.  
 However, as far as I understand with  new ... , the object will be prepared for garbage collection as an object when it will not be scratched .  
 So my question is really the only difference, with the use of   I will release the memory now, whereas with  build , GC Will it be released even when it feels like? Or am I missing something big here?  
 Is there any best practice effect? Should I go and rewrite all the code  MyDisposableObject () ... with  as  as new MyDisposableObject () used in ? By using ... with 
 
 
  
  A series of assertions can be used to block an experiment block several times of the object  
 ... Finally in the construct which uses block resources and finally disposes block to them   
 Any extra code on your part of the resources managed by the dustbin collector Is not it. You do not need the statement  Experiment  or  with . Sometimes your code requires unmanaged resources. You are responsible for their disposal. By using  , the  block guarantees that the  dissection  method on the object is called when your code ends with them.

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