Create a C# class that parses and formats string values (numeric and text) using the format descriptors for Excel.
US-ENGLISH ONLY.
Must follow the Office Open XML spec for four part formatting strings.
Will be comparing built in and custom formats to Excel 2003, 2007, and 2010.
## Deliverables
Following section 3.8.31 from the Office Open XML Part 4 - Markup language Reference (see attached.)
**US EN only.**
I recommend using Excel to validate your code.
Class must be compatible with WPF and Silverlight.