檢測 .net 安裝版本 ~~~ using System; using System.Collections; using System.IO; namespace NET_V { internal class Program { private static void Main(string[] args) { Console.WriteLine(".NET Version :"); DirectoryInfo[] directories = new DirectoryInfo( Environment.SystemDirectory + "\\..\\Microsoft.NET\\Framework") .GetDirectories("v?.?.*"); ArrayList arrayList = new ArrayList(); DirectoryInfo[] array = directories; foreach (DirectoryInfo directoryInfo in array) { arrayList.Add(directoryInfo.Name.Substring(1)); Console.WriteLine(directoryInfo.Name.Substring(1)); } Console.ReadKey(); } public string[] GetDotNetVersions() { DirectoryInfo[] directories = new DirectoryInfo(Environment.SystemDirectory + "\\..\\Microsoft.NET\\Framework").GetDirectories("v?.?.*"); ArrayList arrayList = new ArrayList(); DirectoryInfo[] array = directories; foreach (DirectoryInfo directoryInfo in array) { arrayList.Add(directoryInfo.Name.Substring(1)); } return arrayList.ToArray(typeof(string)) as string[]; } } } ~~~