C# FAQ: How can I declare inout arguments in CSharp?

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How can I declare inout arguments in C#?

To create the equivalent of C-style inout arguments in C#, use the ref keyword. The ref keyword is used in the following method declaration:

public void aMethod (ref String string1, out String string2) 
{
   ...
}

Such a method is called like this:

String string1, string2;
string1 = "Ref_argument";
aMethod (ref string1, out string2);

The ref keyword must be used both when declaring the method and when invoking it.

See also

• C# Keywords
• How do I declare an out variable?