Dr. Holger Schwichtenberg is a .NET MVP with more than 20 years of experience as a developer and trainer. He is currently a technical lead with the German company IT-Visions, where he consults and trains at companies throughout Europe. He also serves as a software architect for 5Minds IT-Solutions. Holger is a huge fan of Entity Framework and Entity Framework Core and regularly speaks about both. He has used EF in projects of all sizes, most recently, on a big data project containing billions of records. He is a prolific writer, having published more than 65 books and 1,000 technical articles in well-known IT professional and developer journals, including MSDN. He has presented at events such as TechEd Europe, Microsoft IT Forum, Advanced Developer Conference, Microsoft Launch, MSDN Technical Summit, and others. Holger has a Ph.D. in business informatics.