a .net data provider is a collection of objects used to communicate between a data source and a data set in other words a data provider is used to communicate with a data source i e database execute commands against the data source and then retrieve results from the data source
By default, the work item file attachment size limit is 2,048 kilobytes (2 MB). For information on how to change the attachment size limit, see How to: Set the Maximum Attachment Size for Work Items. Consider the implications carefully before changing the default attachment size limit. Changing the attachment limit value will alter the attachment size limit for all Team Foundation Server users.
The good news is that the GMail team has increases the maximum allowable limit of the attachment size to 25 MB from the previous limit of 20 MB. This is obviously nice to hear since GMail users can pass on files/data upto 25mb per email easily without having to look for third party file sharing websites like Rapidshare.