NET or understand legacy code to rewrite it using new features of. This will help young professionals to undertake maintenance of existing projects written in older version of. In one such instance we did lot of rework in the application written in 2009 to make it work with MySQL instead of MSSQL server.īefore proceeding with DevExpress XPO I will provide a brief outline of how data access layer evolved in. One of the main reasons that I also started to give this mandate to my team is that some of my customers wanted to switch to open source database like MySQL, PostgreSQL, MongoDB and others because of licensing cost and increasing cost in support. The data access layer must be database agnostic and it should work with any database just by changing connection string.
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