Wrong Windows Working Set Size

AESH

Hi,

I get process working set size by using System.Environment.WorkingSet and stores it in a variable and named it ENWS,
Then I get same process working set size by using GetProcessMemoryInfo API function and named it APWS,
and also I get same process max working set size with GetProcessWorkingSetSize API function and named it MAPWS,
And questions:

First: MAPWS is very very smaller than APWS and ENWS? Why? And what is different? (different is about 200MB!)
Second: ENWS is different from APWS? Why these two are differ from each other? (different is about 40000 bytes)


Can any one help me?