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YOU ARE HERE: HOME Questions What is difference between out and ref keywords in C NET



out vs ref

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What is difference between out and ref keywords in C# .NET?

Answer 1)

ref parameter is both input and o/p parameter
out parameter is only output parameter

As ref parameter treated as input parameter too, ref requires that the variable be initialized before being passed; otherwise you will receive compiler error.

As out parameter treated only as output parameter, out arguments need not be initialized prior to being passed, the calling method is required to assign a value before the method returns.

  Asked in:  SemanticSpace Technologies   Expertise Level:  Intermediate
  Last updated on Thursday, 18 August 2011
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