[DOTNET-ROTOR] Hashtable.Add

[Guru]

I want to implement my own Hashtable.Add method in Collections using
unmanaged code.

Following is a trace from a small program using .NET's Add method:
Entering System.Collections.Hashtable::Add ([0x80bd730] [0x80bd788] )
  Entering System.Collections.Hashtable::PutImpl ([0x80bd730] [0x80bd788]
[0] )
    Entering System.Collections.Hashtable::GetHash ([0x80bd730] )
       Entering System.Collections.Hashtable::get_hcp ()
       Leaving System.Collections.Hashtable::get_hcp
       Entering System.String::GetHashCode ()
       Leaving System.String::GetHashCode
    Leaving System.Collections.Hashtable::GetHash
  Leaving System.Collections.Hashtable::PutImpl
Leaving System.Collections.Hashtable::Add

What are some of the things I have to know to implement the Add method?
   Any internal interfaces that I don't have access to
   Any access to string pool
   Performance bottlenecks with getObject or any others
   etc.

Any references to books or URL is highly appreciated.

thanks,
Guru