How to use type T of generic in runtime to cast it from one of its non-generic interface

Asked Apr 10 '17 at 17:04

Active Apr 10 '17 at 17:07

Viewed 18 times

I have a class

 class Bar<T>:Foo
 {

   // implements Foo's method
   public Type typeOfGeneric
   {
       get
       {
           return T.class;
       }
   }

 }

and in somewhere else, I need to do this:

 var test = tmp as Foo;
 var baseObject = (Bar<tmp.typeOfGeneric>)tmp;

I know this looks weird but I just wonder if it is possible to cast something to a generic T while not knowing T in run-time and get that T in run-time.

Foo doesn't have type T, Bar has type, I need Foo to return Bar type T to be able to use its own methods.

For example, I can't add this in Foo

Bar<T> getCastType{get;}

because T is not know to Foo interface.

edited Apr 10 '17 at 17:07

asked Apr 10 '17 at 17:04

huseyin tugrul buyukisik

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See [`typeof`](https://msdn.microsoft.com/en-us/library/58918ffs.aspx). – Dustin Kingen Apr 10 '17 at 17:06
I tried returning typeof(T) but return value is not usable by casting – huseyin tugrul buyukisik Apr 10 '17 at 17:07
I can't use dynamic. Then I'm stuck here? Should I reconsider making this? – huseyin tugrul buyukisik Apr 10 '17 at 17:09
The point the other post is trying to make is you either need to 1) use known static types, 2) use a generic method, or 3) use runtime reflection to manipulate the code. In your code you can make a reference to `Bar` but the known compile time type will be `System.Object`. – Dustin Kingen Apr 10 '17 at 17:13

How to use type T of generic in runtime to cast it from one of its non-generic interface

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