vb.net - Await requires that the type Task have a suitable GetAwaiter method -


i move working app framework 4.0 4.6.1 , have 1 problem. error message in subject. have second error:

sendpingasync not member of 'ping'

the subject error appears within method below on line highlited:

await isdestinationreachable(ipaddress)

method:

 public async sub pinguj(sender object, e eventargs)         dim isreachable boolean = await isdestinationreachable(ipaddress)         listbox2.items.add("a teraz zmiana")         if isreachable             tspingresulticon.backcolor = color.green         else             tspingresulticon.backcolor = color.red         end if     end sub

second error appear in below method on line:

pinger.sendpingasync(hostnameoraddress)

method:

 public async function isdestinationreachable(byval hostnameoraddress string) task(of boolean)         dim reachable boolean = false         try             if my.computer.network.isavailable                 dim pinger ping = new ping()                 dim result pingreply = await pinger.sendpingasync(hostnameoraddress)                 reachable = result.status = ipstatus.success             end if         catch pingexception system.net.networkinformation.pingexception         catch genericnetworkexception system.net.networkinformation.networkinformationexception             ' fail silently , return false         end try         return reachable     end function


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