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

Environment.Version() ???? ?? 3.5 SP 1 ??? ??? ? .NET Framework ??? ???? ??? ?? ???? ?? ??? ????. ? ????? ?? ???? ???? ???? ?? ????? ?? ???? ?? ??? ?????.

?? ?? ??

.NET ?? 1-4? ?? ??????? ????? ? ??? ? ??? ???? ??? ??? ????.

1. "SOFTWAREMicrosoftNET Framework SetupNDP" ????? ?? ???.
2. ??? ??? ???? ?? ? ??? ?????.
3. ?? ? ?? ?? ??? 'v'? ???? ????? ??? ?????.
4. ?? ?? ??? ???? ?? ?? ?? "SP" ?? ???? ??? ? ??? ?????.

.NET 1-4 ?? ?? ??:

using Microsoft.Win32;
using System.Globalization;

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 ?? ??

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

1. "SOFTWAREMicrosoftNET Framework SetupNDPv4Full" ????? ??? "Release" ?? ?????.
2. ? ?? ???? ?? ??? ??? ?? ?? ??? ?????.

.NET 4.5 ?? ?? ??:

using System;
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)
{
    if (releaseKey >= 528040) {
        return "4.8 或更高版本";
    }
    if (releaseKey >= 461808) {
        return "4.7.2 或更高版本";
    }
    if (releaseKey >= 461308) {
        return "4.7.1 或更高版本";
    }
    if (releaseKey >= 460798) {
        return "4.7 或更高版本";
    }
    if (releaseKey >= 394802) {
        return "4.6.2 或更高版本";
    }
    if (releaseKey >= 394254) {
        return "4.6.1 或更高版本";
    }
    if (releaseKey >= 393295) {
        return "4.6 或更高版本";
    }
    if (releaseKey >= 393273) {
        return "4.6 RC 或更高版本";
    }
    if ((releaseKey >= 379893)) {
        return "4.5.2 或更高版本";
    }
    if ((releaseKey >= 378675)) {
        return "4.5.1 或更高版本";
    }
    if ((releaseKey >= 378389)) {
        return "4.5 或更高版本";
    }
    return "未檢測到 4.5 或更高版本";
}

??? ??? ???? 3.5 SP 1 ??? ?? ??? ???? ??? .NET Framework ??? ? ???? ??? ? ????.

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