Is it possible to pass a variable into a hook by reference? 
Example:

string var1;
string var2;

Plugin.Call("Method",ref var1, ref var2);​

Doing this results in:
Argument `#1' does not require `ref' modifier. Consider removing `ref' modifier

I can solve this problem by using '// Requires: Plugin' however the fact reloading the plugin also reloads every other plugin that also uses this dependency it's just not feasible to use as I would need to require these methods in every plugin.

Possible solution:
Is it possible to include the 'hard' dependency without also reloading every other plugin that also uses it?

Thanks!

Not that I know of for either at the moment.

Unfortunate, I'll try come up with a work around. Thanks for the reply Wulf!