Nuget Install Command Generate Token implementation

InstallCommand.cs

//http://nuget.codeplex.com/SourceControl/changeset/view/435b2c2e1ddd#src%2fCommandLine%2fCommands%2fInstallCommand.cs
private static string GenerateUniqueToken(IPackageManager packageManager, string packageId, SemanticVersion version) {
    var packagePath = packageManager.FileSystem.GetFullPath(packageManager.PathResolver.GetPackageFileName(packageId, version));
    var pathBytes = Encoding.UTF8.GetBytes(packagePath);
    var hashProvider = new CryptoHashProvider("SHA256");

    return Convert.ToBase64String(hashProvider.CalculateHash(pathBytes)).ToUpperInvariant();
}