System.Reflection.Assembly.GetVersion C# (CSharp) Method

        public extern string GetVersion();

        private string GetVersionFromAssembly(Assembly assembly) {
            if (assembly == null)
                return null;

            string version = assembly.GetInformationalVersion();
            if (String.IsNullOrEmpty(version) || String.Equals(version, "0.0.0.0"))
                version = assembly.GetFileVersion();

            if (String.IsNullOrEmpty(version) || String.Equals(version, "0.0.0.0"))
                version = assembly.GetVersion();
            
            if (String.IsNullOrEmpty(version) || String.Equals(version, "0.0.0.0")) {
                var assemblyName = assembly.GetAssemblyName();
                version = assemblyName != null ? assemblyName.Version.ToString() : null;
            }

            return !String.IsNullOrEmpty(version) && !String.Equals(version, "0.0.0.0") ? version : null;
        }