C#读写config配置文件

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public static class ConfigHelper
{
    public static LocalConfig _LocalConfig = null;
    static ConfigHelper()
    {
        _LocalConfig = new LocalConfig();
    }
}

public class ConfigBase
{
    protected Configuration configObject;
    public ConfigBase(string configFilePath)
    {
        ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
        fileMap.ExeConfigFilename = configFilePath;
        configObject = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
    }
    protected void SetConfig(object value, [CallerMemberName] string key = null)
    {
        try
        {
            if (value == null)
                value = string.Empty;
            if (!configObject.AppSettings.Settings.AllKeys.Contains(key))
                configObject.AppSettings.Settings.Add(key, value.ToString());
            else
                configObject.AppSettings.Settings[key].Value = value.ToString();
            configObject.Save(ConfigurationSaveMode.Modified);
        }
        catch(Exception ex) 
        {
            throw ex;
        }
    }
    public object GetConfig([CallerMemberName] string key = null)
    {
        object value = string.Empty;
        if (configObject.AppSettings.Settings.AllKeys.Contains(key))
        {
            value = configObject.AppSettings.Settings[key].Value;
        }
        return value;
    }
}

public class LocalConfig : ConfigBase
{
    static string filePath = AppDomain.CurrentDomain.BaseDirectory + "Static\\Config\\loc.config";
    public LocalConfig():base(filePath) { }
    public string LocalPath
    {
        get { return (string)GetConfig(); }
        set { SetConfig(value); }
    }
    public bool Timestamp
    {
        get 
        {
            object value = GetConfig();
            if (string.IsNullOrEmpty(value.ToString()))
            {
                value = true;
                SetConfig(value.ToString());
            }
            return Convert.ToBoolean(value); 
        }
        set { SetConfig(value); }
    }
}