c# - Pass lambda expression/anonymous method into BackgroundWorker -

suppose have backgroundworker in code. want pass anonymous function/delegate in @ start. code bellow want do:

backgroundworker bw = new backgroundworker(); bw.dowork += (object sender, doworkeventargs e) => {     func<string> f = (func<string>)e.argument;     f("step one");     ...     f("step two"); } bw.runworkerasync((string txt) => {console.writeline(txt);} ); // doesn't work // bw.runworkerasync( delegate(string txt) { console.writeline(txt); })); // doesn't work 

the error:

cannot convert anonymous method type 'object' because not delegate type

or

cannot convert lambda expression type 'object' because not delegate type

so how can passinto lambda expression/anonymous method backgroundworker?

here code in c describe need:

void func(char *ch) {     printf("%s", ch); }  void test( void (* f)(char *) ) {     f("blabla"); }   int main(int argc, char *argv[]) {     test(func);     return 0; } 

you need assign lambda variable , pass in:

action<string> action = (string txt) => console.writeline(txt); bw.runworkerasync(action); 

note i've used action<> code takes data , doesn't return anything. dowork handler wrong , should this:

bw.dowork += (object sender, doworkeventargs e) => {     action<string> f = (action<string>)e.argument;     f("step one");     ...     f("step two"); }