Summary of processing of Section nodes in C# configuration file

namespace ConsoleApplication38
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                SectionToolV2 _sectionHelper = new SectionToolV2("module/appSettings");
                (_sectionHelper.GetValue("Googlemap"));
                (_sectionHelper.ContainKey("YanZhiwei"));
            }
            catch (Exception ex)
            {
                ();
            }
            finally
            {
                ();
            }
        }
    }
    class SectionToolV2
    {
        NameValueCollection ModulSettings = null;
        /// <summary>
///Constructor
        /// </summary>
/// <param name="sectionName">section name</param>
        public SectionToolV2(string sectionName)
        {
            ModulSettings = (sectionName) as NameValueCollection;
        }
        /// <summary>
/// Whether to include this Section
        /// </summary>
        /// <returns></returns>
        public bool ContainSection()
        {
            return !(ModulSettings == null);
        }
        /// <summary>
/// Whether Section contains Key
        /// </summary>
/// <param name="key">key</param>
/// <returns>value</returns>
        public bool ContainKey(string key)
        {
            if (ContainSection())
            {
                return !(ModulSettings[key] == null);
            }
            return false;
        }
        /// <summary>
/// Get the value according to the key
        /// </summary>
/// <param name="Key">key</param>
/// <returns>When there is no key, return</returns>
        public string GetValue(string Key)
        {
            string _value = ;
            if (ContainKey(Key))
            {
                _value = ModulSettings[Key];
            }
            return _value;
        }
    }
}