>Hi,
>I initialize object to private vairable via
>
>public class MyBase
>{
>private MyClass _myClass = new MyClass();
>}
>
>I found that it caused memory leak as it is not released. May I know how should I release it once myBase is released?

As long as there are no longer any other references to that class the garbage collector will clean it up. However, garbage collection doesn't occur immediately. It can take quite a while for it to clean up. Since .NET uses a generational garbage collector the longer MyBase lives the longer it can take for the GC to clean up other references held. It can look like a memory leak when it really isn't.