.NET Framework ?? ??:

? ?????? ?? 3.5? ??? ?(SP) ??? ???? ??? .NET Framework ??? ???? ???? ??? ??? ?????. ? ?? ?? ??? ???????.

????? ?? ?? ??(.NET 1-4?):

Windows ??????? ??? .NET Framework ??? ?? ??? ???? ????. ?? ?? ??? ? ???? ???? ??? ?????.

RegistryKey installed_versions = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP");
string[] version_names = installed_versions.GetSubKeyNames();
double Framework = Convert.ToDouble(version_names[version_names.Length - 1].Remove(0, 1), CultureInfo.InvariantCulture);
int SP = Convert.ToInt32(installed_versions.OpenSubKey(version_names[version_names.Length - 1]).GetValue("SP", 0));

.NET 4.5 ??? ?? Microsoft ?? ??:

Microsoft? ?? ????? .NET Framework 4.5 ? ?? ??? ?? ?? ????? ?? ?? ??? ?????.

using Microsoft.Win32;


...


private static void Get45or451FromRegistry()
{
    using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey("SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\")) {
        int releaseKey = Convert.ToInt32(ndpKey.GetValue("Release"));
        if (true) {
            Console.WriteLine("Version: " + CheckFor45DotVersion(releaseKey));
        }
    }
}


...


private static string CheckFor45DotVersion(int releaseKey)
{
    // Implementation for checking .NET 4.5 version and above
}

??? ??? ??? .NET Framework ?? ? ?? ??? ?(?? 3.5?)? ???? ???? ???? ??? ????? ?? ?? ?? ???? ??? ??? ????.

? ??? ??? .NET Framework ??? ??? ?? ??? ??? ? ?????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!