Hi,
I tried to translate this javascript code to C# in a control silverlight.
var objJohnDoe = window.external.JohnDoe();
objJohnDoe.Message("Hello");
But I can't find the solution.
In theory, there are not problems of security because you can call this method in Javascript so there is a method to call this method in Silverlight...
Can somebody help me ?!? 
Thanks ;)
Best regards.