/// <summary>
/// 直接获取配置值,如果有多层则用冒号分割 eg.:
/// var x = GetValue("ConnectionStrings:Default")
/// </summary>
/// <param name="sectionName"></param>
/// <returns></returns>
public static string GetValue(string sectionName, string projectName = CY_SystemConsts.ServiceProjectName)
{
IConfigurationRoot root = AppConfiguration.Get(projectName);
return(root.GetSection(sectionName).Value);
}