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We need a desktop application that acts as central control to a list of cellphone. So that we can send them message with our advertisement.
UI: a edit text message box, where we can add advertisement, cellphone will be categorized so we need to choose such category from dropdown
and send, save it to later and cancel button.
once send button is clicked this advertisement must be sent to all cell belonging to the category we selected. it must be done in background
technology: C#, sql server.
please provide your previous experience in such project and also complete model that you can follow.