有没有一种方法，使这种方法一般这样我就可以返回一个字符串，BOOL，INT，或双？现在，它的返回一个字符串，但如果它能够找到真或假的配置价值，我想返回一个布尔值，例如

 公共静态字符串ConfigSetting（字符串settingName）
    {
         返回ConfigurationManager.AppSettings [settingName]
    }
 

解决方案

您需要使它成为一个通用的方法，像这样的：

 公共静态牛逼ConfigSetting＆LT; T＆GT;（字符串settingName）
{
    返回/ * code转换的设置来的... * /
}
 

不过的来电的必须指定他们期望的类型。然后，您可能使用 Convert.ChangeType ，假设所有相关类型的支持：

 公共静态牛逼ConfigSetting＆LT; T＆GT;（字符串settingName）
{
    对象值= ConfigurationManager.AppSettings [settingName]
    返程（T）Convert.ChangeType（值的typeof（T））;
}
 

我不完全相信，这一切是个好主意，你要知道...

Is there a way to make this method generic so I can return a string, bool, int, or double? Right now, it's returning a string, but if it's able find "true" or "false" as the configuration value, I'd like to return a bool for example.

    public static string ConfigSetting(string settingName)
    {  
         return ConfigurationManager.AppSettings[settingName];
    }

You need to make it a generic method, like this:

public static T ConfigSetting<T>(string settingName)
{  
    return /* code to convert the setting to T... */
}

But the caller will have to specify the type they expect. You could then potentially use Convert.ChangeType, assuming that all the relevant types are supported:

public static T ConfigSetting<T>(string settingName)
{  
    object value = ConfigurationManager.AppSettings[settingName];
    return (T) Convert.ChangeType(value, typeof(T));
}

I'm not entirely convinced that all this is a good idea, mind you...