WHAT IS THE DIFFERENCE BETWEEN REF & OUT PARAMETERS?

Rajesh Goswami

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Points:425
Posted by  Rajesh Goswami
C# 
C#
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  1. Amit Singh

    Post:565

    Points:2825
    What is the difference between ref & out parameters?

    When we pass a parameter as ref to a method, the method refers to the same variable and changes made will affect 
    the actual variable. even the variable passed as out parameter is same as ref parameter, but implementation in
    c# is different,
    Arguement passed as ref parameter must be initialized before it is passed to the method. But in case of out
    parameter it is not necessary. But after a call to a method as out parameter it is necessary to initialize.
    When to use out and ref parameter, out parameter is used when we want to return more than one value from a method.

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