C# configuration manager

ConfigManager.cs

/// <summary>
/// Simple manager for config items
/// </summary>
public static class ConfigManager
{  
    /// <summary>
    /// Get the config value for the given key/name
    /// </summary>
    /// <typeparam name="T">The expected type of the config values</typeparam>
    /// <param name="configKey">The configuration key to get</param>
    /// <param name="defaultValue"></param>
    /// <returns></returns>
    public static T GetConfig<T>(string configKey, T defaultValue = default(T))
    {
        T results = defaultValue;

        //  By default, just use the app config file to get configuration data:
        if(!string.IsNullOrEmpty(configKey))
        {
            //  First get the string value:
            string stringvalue = ConfigurationManager.AppSettings[configKey];

            try
            {
                //  Make sure the returned value isn't null or empty
                if(!string.IsNullOrEmpty(stringvalue))
                {
                    var theType = typeof(T);

                    //  If we're expecting an enumerated type...
                    if(theType.IsEnum)
                    {
                        //  attempt to cast to the enum:
                        results = (T)Enum.Parse(theType, stringvalue, true);
                    }
                    else
                    {
                        //  Otherwise, just cast to the type
                        results = (T)Convert.ChangeType(stringvalue, theType);
                    }
                }
            }
            catch { /* Just fall through to the defaults */ }
        }

        return results;
    }
}