Question about ofuscating .net

[TheEvilAnt]

Hi, i have thinekd in making an application a big one, but as most programmers of .net should know it can be decompyled so they can have the source code of your application it is hard to remake the whole application but with time you can do it then here is my question, is there any way to comlpetly protect your C# .NET application from beign decompyled?

 

Thanks, evilant.