Weak references in C #

Code Description:

 

Code

Class Program
{
Static void main (string [] ARGs)
{
Dowork ();
Console. writeline (P. Target = NULL );
GC. Collect ();
Console. writeline (P. Target = NULL );

Console. Readline ();
}

Public static weakreference P;
Public static void dowork ()
{
VaR P = getperson ();
P = new weakreference (P );
}

Public static person getperson ()
{
Return new person ();
}
}
Public class person: idisposable
{

Public Person ()
{

For (INT I = 0; I <new random (). Next (18, 80); I ++)
{
This. memo. append (char) new random (). Next (97,123 ));
}
}

Public stringbuilder memo {Get; set ;}

Public bool isdisposed {Get; set ;}
# Region idisposable Member

Public void dispose ()
{
If (! This. isdisposed)
{
Console. writeline ("person dispose ...");

This. memo. Remove (0, this. memo. Length );
This. isdisposed = true;
GC. suppressfinalize (this );
}
}

# Endregion

~ Person ()
{
Console. writeline ("person unctor ...");
This. Dispose ();
}
}