Adding Type Filters In C#

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How do I add type filters to a .NET Dictionary so that the TValue will be a class object that inherits my EventListener interface? So for example

Dictionary<string, object> events = new Dictionary<string, object>(); //where object would have to inherit EventListener

Posted 13-Aug-13 10:46am

Sicppy

Updated 13-Aug-13 10:47am

Richard C Bishop

v2

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**Zoltán Zörgő** · Accepted Answer · 2013-08-13T11:02:00

Solution 1

Look at following sample:

C#

interface I {};

class a : I {};
class b : I {};
class c {};

void Main()
{
    Dictionary<string, I> x = new Dictionary<string, I>();
    x.Add("a", new a());
    x.Add("b", new b());
    x.Add("c", new c()); //will fail
}

Posted 13-Aug-13 11:02am

Zoltán Zörgő

Comments

Sicppy 13-Aug-13 17:06pm

Thank you much! Let me test, but if it works ill accept the solution!

Zoltán Zörgő 13-Aug-13 17:07pm

It works, I made this demo in LinqPad.

Sicppy 13-Aug-13 17:15pm

Yeah, i was just making sure. Thanks again!

-Jordan

Sergey Alexandrovich Kryukov 13-Aug-13 17:25pm

Sure, a 5.
—SA