Marshal. releasecomobject

. Net's garbage collection mechanism is not responsible for the collection of COM objects. Therefore, to manually recycle COM objects, you can use releasecomobject and finalreleasecomobject of the marshal object provided by. Net to solve this problem.

Among them, releasecomobject

Decrements the reference count of the supplied runtime callable wrapper.

Finalreleasecomobject:

Releases all references to a runtime callable wrapper (RCW) by setting the reference count of the supplied RCW to 0.

For more information, see the following link:

 

The ins and outs of Microsoft's marshal. releasecomobject Method

ESRI Developer Network -- how to release com references

Release of several common unmanaged objects in. NET + AE Development