How to pin a pointer to managed object in C#?

问题:

Unmanaged code calls my functions. In first function I should pass back pointer to my managed object. Sometimes later some of my other functions get called with that same pointer as one of parameters . I should dereference it and use it to perform some calculations and then if it is not needed dispose of it. To cut the story short I need to pin that object so that GC won't move it til I dispose of it. How to do that in C# ? Thanks in advance.

回答1:

To pin an object in C#, you can use GCHandle.Alloc method with second parameter GCHandleType.Pinned. Object remains pinned until GCHandle instance is released using GCHandle.Free method.