My colleague tells me that ASP.NET MVC with Entity Framework Core does not support calling SQL stored procedures. Is this true? If not, where can I find information on how to do this? Thanks!
If you take a look at the EF Core / EF 6.x Feature Comparison you will see that EF Core indeed does not support SQL Stored Procedures:
Stored procedure mapping allows EF to use stored procedures to persist changes to the database (FromSql already provides good support for using a stored procedure to query, see Raw SQL Queries for details).