CoresolutionCoresolution is an ASP.NET MVC web application for travel & expenses and time & attendances (ERP system) which I developed in a team of four during my studies and thereafter at Coredat Business Solutions. It was planned and developed by my colleagues and me from scratch using the MVC pattern and the server side programming language C#. On client side it is built on HTML, Javascript and the DHTMLX UI library. The database server is a MS SQL Server and therefore we used Entity Framework as an OR-Mapper. With the help of this comprehensive application it is possible to enter your travels and vouchers and the per diems are calculated automatically. Further it is possible to manage your working times and absence requests with an individual configurable approval workflow.