Mono.Addins.Addin.SetIsUserAddin C# (CSharp) Method

        void SetIsUserAddin(AddinDescription adesc)
        {
            string installPath = database.Registry.DefaultAddinsFolder;
            if (installPath [installPath.Length - 1] != Path.DirectorySeparatorChar)
                installPath += Path.DirectorySeparatorChar;
            isUserAddin = adesc != null && Path.GetFullPath (adesc.AddinFile).StartsWith (installPath);
        }