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.
Enter the desired attachment size limit in KB under Value Data:. To set a size limit of 25 MB, for example, use 25600. The default value (with MaximumAttachmentSize not present) is 20 MB or 20480. For no attachment file size limit, enter 0. Practically all mail servers do have a size limit, though, so 0 is not recommended; you would invariably get large messages back as undeliverable after an often long and fruitless uploading process. Ideally, the limit corresponds to your mail server's limit.