Searching good packer/obfuscator for c# .exe program.

I'm searching who can help me to pack my .NET (c#) compiled program. Is only a .exe file that is a program for windows desktop. With "pack" my file I mean obfuscate it and use tricks for that others coders will can't analyze or decompile/crack my program. Is very important that the packer/obfuscator have options for generate different EXE's files. I mean generate differents packeds/obfuscateds EXEs from 1 exe, different size, vars and functions names etc. In summary one exe packed/obfuscated must be as much different as other one. If you have your own packer/obfuscator will be perfect. But also I could accept if you can help me to found good packer/obfuscator. Please send me a related proposal about what you think. Because if you send a copy/paste I will not chat to you. thanks you and sorry my bad english