Exceptions raised in execution of command are wrapped if custom handler in place

[alexs1305]

Given the user is using EasyCommand.AspNetCore and the user has registered a custom handler and created commands. When a command raises an exception this exception type is wrapped in another exception raised in the handlers AfterExecutionAsync method. This breaks any catches on specific exception types outside of the command.
So with

Controller1.Get(){
    try{
        this.ExecuteAsync(this.Command<GetCommand>());
    }
    catch (SpecificException e)
    {
    }
}

if GetCommand throws SpecificException this will not be caught. Instead an exception of type Exception will be thrown with an inner exception of SpecificException

[alexs1305]

This is by design, however the fact that it is throwing a generic System.Exception is probably not the best solution to this and it feels ambiguous. This should be changed instead to a custom exception that indicates that the handler has failed in running the command