DotNetBrowser provides an API which allows extracting the required Chromium binary files to the specified directory manually. It can be done using the ChromiumBinaries.ExtractToDirectory(string directory) static method.
This method extracts the appropriate 32-bit or 64-bit Chromium binaries to the specified directory. If the directory does not exist, it will be created. The required binary files will be extracted to the appropriate 32bit or 64bit subdirectory, so that the applications with the different target platforms can use the same binaries root directory.
The decision, which binaries (32-bit or 64-bit) should be extracted, is based on the application's target platform. For the details, see the Chromium 64-bit article.