Looking for buy sourse of inventory management whic is developed in WPF and also want a Team designer as per i want

Hello Developer's I want to buy source of complete inventory management software which will able manage of info detail of baying and selling parodists inventory management must be developed in WPF technology it was be developed using language c# Programming, SQL Database, Linq to SQL connectivity. and I also looking for a person how can able to design a WPF Style Sheet for all controls. example: Textbox, DataGrid, Button, Dropdown box, list box, Check Box etc. this must be design in a VS2012 and using bland and and I also want a full bland software fully activated which i can able to instal on any window os and use it comfortable in my system. please don't bit out of my budget. Not: I want all souse code file of inventory management as well database script. and I'll make milestone before buy code from you. you can also provide me the implementation of code of 30 day trial for product. which i wright it in c# as [login to view URL] one the trial expire softer get block menu control and get inner pop up in window to ask use to buy Lenience so i can able to set license for product as per I want. like i set a license for 1 year then it will be one year as per machine. like key is KSAJ-SAKD-SAKD-SADK it will be for single machine , 2 machine or unlimited machine. for 1 year what ever license allow with key. Thank You Good Luck for to all of you.