C#读取本机安装的.net framework 版本

转自：http://geekswithblogs.net/lorint/archive/2006/01/30/67654.aspx

// (Note that lbInstVersions is a listbox placed on a WinForm or Web Form.)string componentsKeyName="SOFTWARE\\Microsoft\\Active Setup\\Installed Components",friendlyName,version;// Find out in the registry anything under://    HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components// that has ".NET Framework" in the nameRegistryKey componentsKey=Registry.LocalMachine.OpenSubKey(componentsKeyName);string[] instComps=componentsKey.GetSubKeyNames();foreach(string instComp in instComps){RegistryKey key=componentsKey.OpenSubKey(instComp);friendlyName=(string)key.GetValue(null); // Gets the (Default) value from this keyif(friendlyName != null && friendlyName.IndexOf(".NET Framework")>=0){// Let's try to get any version information that's availableversion=(string)key.GetValue("Version");// If you want only the framework info with its SP level and not the// other hotfix and service pack detail, uncomment this if://    if(version!=null && version.Split(',').Length>=4)lbInstVersions.Items.Add(friendlyName+(version!=null?(" ("+version+")"):""));}}