First find dotfuscator.exe

Create a new project, then browse to the trigger tab to select the assembly you want to obfuscate

Then create a tab Select your target directory (the directory where the newly generated assembly is saved after obfuscation)

The very basic configuration has been completed here. If you want to save these to an XML configuration file and use it directly later, select the file -Save the project. Click the Generate button and you will find that an obfuscated assembly has been generated in the target directory.