C# Can I check if an IntPtr is null?

Question

I have an IntPtr field in my C# class.
It holds a reference to an object in a C++ library.

protected IntPtr ThingPtr;

At some stage I may or may not initialise it.

ThingPtr = FunctionInMyCplusplusLibrary();

I'm wondering if checking whether it is null makes sense in this context (to check whether it has been intialised or not)

if(ThingPtr == null)
{
    //Do stuff
}

Answer 1

IntPtr is a value type and cannot be null.

You want to check whether it has a value of (address) 0:

if (ThingPtr == IntPtr.Zero)

Answer 2

IntPtr是一个永远不能为null的结构，你的库可能返回null的等价物，但我希望它是零。

Answer 3

您可以将IntPtr.Zero用于null，但它不等同于C＃null值。