c# - How do you get the value from Func<t> called async? -

how value func<t> called using begininvoke?

for example:

private void mytest() {     func<string> foo = bar;      foo.begininvoke(barcomplete, null); }  private string bar() {     return "success"; }  private void barcomplete(iasyncresult ar) {     var result = (string) ar.asyncstate;      console.writeline(result); // should print "success" } 

do have cast asynccallback , call endinvoke?

anyways, feedback.

asyncstate holds null passed in 2nd parameter, should pass foo object in instead. result must call endinvoke foo object , return object version of result.

private void mytest() {     func<string> foo = bar;      foo.begininvoke(barcomplete, foo); }  private string bar() {     return "success"; }  private void barcomplete(iasyncresult ar) {     var foo = (func<string>)ar.asyncstate;     var uncastresult = foo.endinvoke(ar); //this returns "object", still work writeline     var castresult = (string)uncastresult;      console.writeline(uncastresult); // should print "success"     console.writeline(castresult); // should print "success" }