C# detect latest .net framework installed on PC（cp是什么意思?）
using Microsoft.Win32;
static void Main(string[] args)
{
GetDotNetFrameworkVersion();
Console.ReadLine();
}
static void GetDotNetFrameworkVersion()
{
const string subKey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full";
using (var ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(subKey))
{
if(ndpKey!=null && ndpKey.GetValue("Release")!=null)
{
var objResult = ndpKey.GetValue("Release");
var versionResult = CheckFor45PlusVersion((int)objResult);
Console.WriteLine($".NET Framework Version:{versionResult}");
}
else
{
Console.WriteLine(".NET Framework Version 4.5 or later is not detected!");
}
}
}
//Convert the Main.Minor.Build.Revision
static string CheckFor45PlusVersion(int releaseKey)
{
if(releaseKey>=528040)
{
return "4.8 or later";
}
if(releaseKey>=461808)
{
return "4.7.2";
}
if(releaseKey>=461308)
{
return "4.7.1";
}
if (releaseKey >= 460798)
{
return "4.7";
}
if(releaseKey>=394802)
{
return "4.6.2";
}
if(releaseKey>=394254)
{
return "4.6.1";
}
if(releaseKey>=393295)
{
return "4.6";
}
if(releaseKey>=393295)
{
return "4.5.2";
}
if(releaseKey>=378675)
{
return "4.5.1";
}
if(releaseKey>=378389)
{
return "4.5";
}
return "No 4.5 or later version detected!";
}
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