C#, default parameter value for an IntPtr

c# intptr default-parameters
Tom Davies picture Tom Davies · Oct 21, 2012 · Viewed 7.6k times · Source

I'd like to use a default parameter value of IntPtr.Zero in a function that takes an IntPtr as an argument. This is not possible as IntPtr.Zero is not a compile time constant.

Is there any way I can do what I want?

Answer

Hans Passant picture Hans Passant · Oct 21, 2012

Somewhat unintuitive, to put it mildly, you get it by using the new operator:

    void Foo(IntPtr arg = new IntPtr()) { 
    }

That was for fun, you probably enjoy this one better:

    void Foo(IntPtr arg = default(IntPtr)) { 
    }

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