c# - How to extract a method which is using "using" keyword and is disposable -

i have around 20 methods, of them requires userprincipalextension disposable class different operations, want extract separate method, not sure how to,

public static userprincipalextension getupe(identity type, string identity)     {         using (principalcontext pc = myutilities.getprincipalcontext())         using (userprincipalextension upe = userprincipalextension.findbyidentity(pc, type, identity))         {              // different operations             // if return upe here pc going dispose ?         }       // how best return upe , dipose pc well, return upe;     } 

so can use in other methods this:

var upe = getupe(identitytype.sid, "s-32sldkfjsldr344"); using(upe) {  } 

upe , principalcontext should disposed afterwords.

unless upe has own way of disposing principal context, have 2 options - make wrapper class around upe, or use helper function.

there's little said wrapper class approach - have class has field both pc , upe, , have dispose method dispose of both. depending on requirements, either make upe public, or expose methods need. simplest possible example this:

class upewrapper : idisposable {   public readonly principalcontext principalcontext;   public readonly userprincipalextension userprincipalextension;    public upewrapper(principalcontext principalcontext,                      userprincipalextension userprincipalextension)   {     this.principalcontext = principalcontext;     this.userprincipalextension = userprincipalextension;   }    public void dispose()   {     try     {       userprincipalextension.dispose();     }         {       principalcontext.dispose();     }   } } 

using helper function bit less boilerplate:

void useuserprincipalextension(identity type, string identity,                                 action<userprincipalextension> action) {   using (principalcontext pc = myutilities.getprincipalcontext())   using (userprincipalextension upe =           userprincipalextension.findbyidentity(pc, type, identity))   {     action(upe);   } } 

and usage quite simple well:

useuserprincipalextension   (     a, b,      upe =>      {       // work here     }   );