c# - DLL containing custom attribute remains locked -

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i trying write attribute apply security method. this: 

[customauthorization(securityaction.demand)] public void dosomething() {   //do }

so have attribute on assembly:

 public sealed class authorizationattribute : codeaccesssecurityattribute  {               public override ipermission createpermission()         {                 if (!/*authorize here*/)                 {                      return new custompermission(permissionstate.unrestricted);                 }                 throw new exception("identificationfailure.");             }          }          public authorizationattribute(securityaction securityaction)             : base(securityaction) {  }     }

so far works. run main program , job.

now go , modify assembly having attribute, build it. no problem.

i go in main program try build , there fails. cannot copy new built dll because old 1 still in use process.

does have idea happening here?

if you're using vs2010, there issue vhost.exe not releasing instance. can end process on until ms comes out fix.


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