Wpf grid with 2 way binding and bound to observable collection.(please bid if you can deliver 70 % in 3 days)

I want a wpf datagrid which can be [login to view URL] of wpf binding and use of observable collection is preferred. Please bid only if you are an expert in wpf . for this I need some base data containers like 1. a DataCell object which holds: - Nullable<decimal> value (or string value, or even object value – I need to display various types of data in various types of grids) - DataCellFormat format 2. A DataCellFormat enum which contains things like: - Data type (decimal, string, etc.) - Data format (such as standard C# format specifiers, 0:C, #.##d, etc.) - Cell colors (foreground, background) - CellReadOnly (may not be most appropriate in this particular enum, but probably fine to get started) 3. A DataRow, which could be an ObservableCollection<DataCell> 4. A DataSheet, which could then be an ObservableCollection<DataRow> Once data objects are created, populate them with a set of data. This can be anything: all zeros, random numbers(for testing purpose) or I should be able to pull data from database. A DataSheet could then represent anything from a (10x360) sheet to a small, specific set of values (3x3). Once populated, I need to style a base DataGrid to handle display, data entry, etc. The grid should have 2 way binding for display aswell as persisting [login to view URL] Inotifypropertychanged and property changed, CellTemplates, DataTemplates, etc. but some things (like making a cell read-only) may have to be done via event handlers. The Grid should have the following things possible- 1 A whole column or portion of a column can be read-only 2 A whole row or portion of a row can be read-only 3 A single cell can be read only 4 DataGrid can freeze columns [not rows], If a workaround is possible to make rows freeze too then that would be [login to view URL] not its fine... There should be validations for example- For now when you run the application,if the grid contains decimal values in some columns and date in one then - [login to view URL] cell with value above 10000 should have green background 2. then if a user enters a value more than 10000 it should turn the background of that cell to green. [login to view URL] one of the cell has a date then that cell should be readonly. [login to view URL] cell with value =0 should be readonly and if user changes a value to 0 then that cell should become readonly. One important function to keep in mind is an “OnCellDataChanged” event handler. Grid will auto-fill multiple cells with data in response to data entry in a cell done by the user. This event handler should be fired by the data object (in response to OnPropertyChanged), by the Grid itself, or both.