c# - Is there a way to get the Generic Type from an Extension method? -

consider method:

public static tresult castto<t, tresult>(this t arg)         {             typeconverter typeconverter = typedescriptor.getconverter(typeof(t));             bool? converter = typeconverter?.canconvertto(typeof(tresult));             if (converter != null && converter == true)                 return (tresult)typeconverter.convertto(arg, typeof(tresult));             else                 return default(tresult);         } 

is there way set generic type extension method, mean, instead call:

 string s = "1";  s.castto<string, int>(); 

something input type directly class who's calling. i'm pretty new c# , want know issue.

you can ommit type when generic method returns nothing:

public static void castto<t, tresult>(this t arg, out tresult var) {     typeconverter typeconverter = typedescriptor.getconverter(typeof(t));     bool? converter = typeconverter?.canconvertto(typeof(tresult));     if (converter != null && converter == true)         var = (tresult)typeconverter.convertto(arg, typeof(tresult));     else         var = default(tresult); } 

and use so:

string s = "1"; int i; s.castto(out i); 

it know both base type , output type without having explicitely name them.