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 new maximum size of an individual file is 8 terabytes (2^63) on ext2 or ReiserFS filesystems, on LFS-compatible hosts. For other suitable filesystems, a different limit may apply in each, but reported values are all quite large.