Microsoft.Win32
System
System.Collections.ObjectModel
class Program
{
static void Main(string[] args)
{
InstalledDotNetVersions().Dump();
}
public static Collection InstalledDotNetVersions()
{
Collection versions = new Collection();
RegistryKey NDPKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP");
if (NDPKey != null)
{
string[] subkeys = NDPKey.GetSubKeyNames();
foreach (string subkey in subkeys)
{
GetDotNetVersion(NDPKey.OpenSubKey(subkey), subkey, versions);
GetDotNetVersion(NDPKey.OpenSubKey(subkey).OpenSubKey("Client"), subkey, versions);
GetDotNetVersion(NDPKey.OpenSubKey(subkey).OpenSubKey("Full"), subkey, versions);
}
}
return versions;
}
private static void GetDotNetVersion(RegistryKey parentKey, string subVersionName, Collection versions)
{
if (parentKey != null)
{
string installed = Convert.ToString(parentKey.GetValue("Install"));
if (installed == "1")
{
string version = Convert.ToString(parentKey.GetValue("Version"));
if (string.IsNullOrEmpty(version))
{
if (subVersionName.StartsWith("v"))
version = subVersionName.Substring(1);
else
version = subVersionName;
}
Version ver = new Version(version);
if (!versions.Contains(ver))
versions.Add(ver);
}
}
}
}