ref vs out in C#

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Difference between ref and out parameters in .NET

When to use ref and when to use out ? What is difference between the both ? How and where they are used ?

Please share an example showing difference between the both ref and out .

Thanks.

score 5 · Answer 1 · answered Nov 15 '10 at 17:05

To my understanding:

ref means passing a variable by reference, which means you pass a pointer to that variable and it will retain modifications after leaving the function.

out means basically the same, except that the variable must be assigned before the function is exited, pretty much like return statements must be met before the function reaches completion.

score 1 · Answer 2 · answered Nov 15 '10 at 17:05

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I would start here. Jon does a good job explaining it all:

http://www.yoda.arachsys.com/csharp/parameters.html

answered Nov 15 '10 at 17:05

kemiller2002

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score -1 · Accepted Answer · answered Nov 15 '10 at 17:06

-1

There's any number of examples online.

A quick Google search found this: http://www.c-sharpcorner.com/UploadFile/mahesh/out_and_ref11112005002102AM/out_and_ref.aspx

answered Nov 15 '10 at 17:06

Nathan

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ref vs out in C#

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