/// <summary>
 /// Gets the repeater row count.
 /// </summary>
 /// <param name="that">The <see cref="Dictionary{T, V}"/> that acts as the this instance.</param>
 /// <param name="propertyName">The name of the property to get the total of.</param>
 /// <returns>A count of repeater rows.</returns>
 private static object GetRepeaterRowCount(Dictionary<string, object> that, string propertyName)
 {
     object[] values = (object[])that.GetApplicationDataValue(typeof(object[]), propertyName);
     return values.Length.ToString();
 }
        /// <summary>
        /// Gets the repeater total value.
        /// </summary>
        /// <param name="that">The <see cref="Dictionary{T, V}"/> that acts as the this instance.</param>
        /// <param name="returnType">The expected type of the return value.</param>
        /// <param name="propertyName">The name of the property to get the total of.</param>
        /// <returns>The repeater total value.</returns>
        private static object GetRepeaterChildTotal(Dictionary<string, object> that, Type returnType, string propertyName)
        {
            Type genericListType = typeof(List<>).MakeGenericType(returnType);
            IList values = (IList)that.GetApplicationDataValue(genericListType, propertyName);

            List<int> intValues;
            if (TryParseIntegerList(values, out intValues))
            {
                return intValues.Sum().ToString();
            }

            List<double> doubleValues;
            if (TryParseDoubleList(values, out doubleValues))
            {
                return doubleValues.Sum().ToString(CultureInfo.InvariantCulture);
            }

            return null;
        }