C#中using

using当执行完代码段立即调用实例的Dispose 例子：

public static bool MergeDiff(string ver1, string ver2, string diff) { try { using(var src = new FileStream(ver1, FileMode.Open, FileAccess.Read)) { using(var dst = new FileStream(ver2, FileMode.CreateNew, FileAccess.Write)) { using(var rd = new FileStream(diff, FileMode.Open, FileAccess.Read)) { bool r = MergeDiff(src, dst, rd); return r; } } } } catch(System.Exception exp) { AppLog.Error("MergeDiff Failed : " + exp.ToString()); return false; } }