First commit

DaSaSo.EntityFramework/DaSaSoDbContextFactory.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DaSaSo.EntityFramework
+{
+    public class DaSaSoDbContextFactory : IDesignTimeDbContextFactory<DaSaSoDbContext>
+    {
+        public DaSaSoDbContext CreateDbContext(string[] args)
+        {
+            var options = new DbContextOptionsBuilder<DaSaSoDbContext>();
+            options.UseNpgsql("server = localhost");
+            return new DaSaSoDbContext(options.Options);
+        }
+    }
+}