understood my mistake and created DataContext.cs with new name lol

SurveyLib.Infrastructure.EFCore/Data/SurveyDbContext.cs

@@ -0,0 +1,17 @@
+using Microsoft.EntityFrameworkCore;
+using SurveyLib.Core.Models;
+
+namespace SurveyLib.Infrastructure.EFCore.Data;
+
+public class SurveyDbContext : DbContext
+{
+    public DbSet<Survey> Surveys { get; set; }
+    public DbSet<QuestionBase> Questions { get; set; }
+    public DbSet<Completion> Completions { get; set; }
+    public DbSet<Answer> Answers { get; set; }
+
+    public SurveyDbContext(DbContextOptions<SurveyDbContext> options) : base(options)
+    {
+        
+    }
+}