End Google Ads 201810 - BS.net 01 --> hi

i developed a software using c#
now i need to apply security for it.

what i mean is no one can decode my exe and other dlls.
and develop the similar software.

one more doubt is ...
i made a setup using dotnet
then after installing it , exe file and other dlls are installed at a ********.

can any one break my exe and get the actual code what i written