/// <summary>
/// Add the sectionname, key, value.
/// </summary>
/// <param name="sectionName"></param>
/// <param name="key"></param>
/// <param name="val"></param>
/// <param name="overWrite"></param>
public void Add(string sectionName, string key, object val, bool overWrite)
{
_provider.Add(sectionName, key, val, overWrite);
}
