Using DataStores

Using DataStore in C# code:

1) Create/Update
   DataStoresUtility.Set(key, value)
2) Read
   DataStoresUtility.GetField(key)
3) Delete
DataStoresUtility.RemoveField(key)

Using DateStores in Skins:

1) Create/Update
    $DataStoresUtility.Set(key, value)
2) Read
    $DataStoresUtility.GetField(key)
3) Delete
    $DataStoresUtility.RemoveField(key)

Using DataStores in BackOffice as property value

Just use {} (curly brackets, braces) around the key - {PO:key}, {PO:startDate}, {U:name}
See the images for more details.