I'm done writing my C# application. I made it on Visual Studio 2010, .NET 4.0, and I use "Microsoft.Jet.OLEDB.4.0" in it (by using it as a provider in a connection string). Now I want to be able to distribute it, but I also want to have it obfuscated. I used ClickOnce before to create my installers and worked great, but I don't know how to incorporate this with Dotfuscator. I don't really have to use ClickOnce. I'm open to any other solution. What I require is to distribute an application that will download and install .NET 4.0 (if required), Jet 4.0 (if required) and that the user would have a hard time to decompile. I don't care how. There are just too many options and they all require some knowledge that I don't have. I also tried Inno Setup. Apparently you can configure it to download dependencies. I found an article in CodeProject but after creating and running my installer with a code to download and install the Jet engine I got an error message (maybe because I already have it installed). I don't think this should be hard at all for a person with a little bit more knowledge than I. As I said, I don't care how but I just want to distribute my app, obfuscated, and make it auto-download and install those 2 dependencies (.NET 4.0 and Jet 4.0).