关于一个C#的WaitHandle.WaitAny()的重载问题

[孤独终老么]

今天在项目的SVN上下载了一个程序。在自己机器上编译运行很好，然后我又把这个程序拷到另一台机器上，编译的时候居然过不了，无法生成dll。
问题在于WaitHandle.WaitAny()的重载上,即参数的个数问题,WaitAny不存在参数为2的重载。
在我自己的机器上，看WaitHandle.WatiAny（）的从元数据的定义如下：

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout);
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, TimeSpan timeout);
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext);
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, TimeSpan timeout, bool exitContext);
   

在另一台机器上

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext);
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        public static int WaitAny(WaitHandle[] waitHandles, TimeSpan timeout, bool exitContext);
   

也就是说另一台机器上WaitAny不存在2个参数的重载。但是两台机器的安装包是同一个，请问这是什么情况？重装了一次visual studio 2008还是相同的问题。是不是编译器要做一些设置还是怎么的？

[gomoku]

.net的版本（service pack)不一样。