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.
iCloud Mail Message and Attachment Size Limits. messages up to 20 MB (20000 KB) in size. This limit includes the message text and attachments. Note that encoding typically increases the size of files (by about a third) other than plain-text ASCII documents when they are attached to an email. To send files that would bump an email over iCloud Mail's message size limit, you can use a big file sending service.