.Net 2.0 原汁原味读取注册表_Asp.Net开发技巧

时间：2010-09-16 来源：蔚蓝的大海

在.Net 1.x当中，使用Microsoft.Win32.RegistryKey类的GetValue方法读取注册表数据时，其实数据都是经过“处理”的；
例如，某个字符串数据本来的值是
%SystemRoot%\System32\IoLogMsg.dll
但是用GetValue方法得到的数据却是
C:\WINDOWS\System32\IoLogMsg.dll

也就是说，在读取注册表中的字符串时，系统会自作主张地替你展开环境变量。
这的确省去我们调用Environment.ExpandEnvironmentVariables方法的麻烦，但是反过来，当我们希望原封不动地拷贝一个注册表的字符串时则束手无策。

在.Net2.0当中，我们惊喜地发现Microsoft.Win32.RegistryKey类有了一个小小的改动，就是其GetValue方法增添了一个新的重载：
public Object GetValue (
    string name,
    Object defaultValue,
    RegistryValueOptions options
)该方法的第三个参数是一个枚举，目前只有一个有用的值就是DoNotExpandEnvironmentNames。
指定该值，GetValue得到的结果就是没有经过展开的数据了。

http://smalldust.cnblogs.com/archive/2006/06/26/436164.html

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