Add example user-defined function.

EntityFrameworkCore.Console/Program.cs

@@ -17,6 +17,21 @@ context.Database.EnsureCreated();
 // var firstCoach = await context.Coaches.FirstOrDefaultAsync();
 
 
+async Task UserDefinedQuery()
+{
+  var earliestMatch = context.GetEarliestTeamMatch(1);
+  // This is done, if you have a user-defined function in the database.
+  // for example:
+  // CREATE FUNCTION [dbo].[GetEarliestMatch] (@teamId int)
+  //   RETURNS datetime
+  //   BEGIN
+  //     DECLARE @result datetime
+  //     SELECT TOP 1 @result = date
+  //     FROM MATCHES [dbo].[Matches]
+  //     ORDER BY Date
+  //     return @result
+  //   END
+}
 
 async Task QueryScalarType()
 {

EntityFrameworkCore.Data/DeadBallZoneLeagueDbContext.cs

@@ -41,5 +41,16 @@ public class DeadBallZoneLeagueDbContext : DbContext
 
     // This database object does not have a Primary Key, so we state that here, otherwise an exception is thrown.
     modelBuilder.Entity<TeamsAndLeaguesView>().HasNoKey().ToView("vw_TeamsAndLeagues");
+
+    // This is for user-defined functions.
+    modelBuilder.HasDbFunction(
+      typeof(DeadBallZoneLeagueDbContext)
+      .GetMethod(
+        nameof(GetEarliestTeamMatch),
+        new[] {typeof(int)}
+      ))
+      .HasName("GetEarliestMatch");
   }
+
+  public DateTime GetEarliestTeamMatch(int teamId) => throw new NotImplementedException();
 }