What is the difference between `ref` and `out` parameters in C#?

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Answered by suresh

Difference between `ref` and `out` parameters in C# - Interview Question

Difference between ref and out parameters in C#

In C#, both `ref` and `out` parameters are used to pass arguments by reference to a method. However, there are key differences between them:

ref Parameters:

  • Must be initialized before passing to the method.
  • Method can read and modify the value of `ref` parameter.
  • Changes made to the `ref` parameter inside the method are reflected outside the method.

out Parameters:

  • Do not need to be initialized before passing to the method.
  • Method must initialize the `out` parameter before returning.
  • Designed to return a value from a method.

It is important to choose between `ref` and `out` parameters based on the specific requirements of your method and how you intend to use the passed arguments.

Answer for Question: What is the difference between `ref` and `out` parameters in C#?