added Answer.cs

SurveyLib.Core/Models/Answer.cs

@@ -0,0 +1,12 @@
+namespace SurveyLib.Core.Models;
+
+public class Answer
+{
+    public int TryId { get; set; }
+    public int SurveyId { get; set; }
+    public int QuestionId { get; set; }
+    public string AnswerText { get; set; }
+
+    public Survey Survey { get; set; }
+    public QuestionBase Question { get; set; }
+}

SurveyLib.Core/Models/QuestionBase.cs

@@ -7,4 +7,5 @@ public class QuestionBase
     public string Title { get; set; }
 
     public Survey Survey { get; set; }
+    public ICollection<Answer> Answers { get; set; }
 }

SurveyLib.Core/Models/Survey.cs

@@ -7,4 +7,5 @@ public class Survey
     public string Description { get; set; }
 
     public ICollection<QuestionBase> Questions { get; set; }
+    public ICollection<Answer> Answers { get; set; }
 }