diff --git a/SurveyLib.Core/Class1.cs b/SurveyLib.Core/Class1.cs
deleted file mode 100644
index 41c44da..0000000
--- a/SurveyLib.Core/Class1.cs
+++ /dev/null
@@ -1,5 +0,0 @@
-namespace SurveyLib.Core;
-
-public class Class1
-{
-}
\ No newline at end of file
diff --git a/SurveyLib.Core/Models/Answer.cs b/SurveyLib.Core/Models/Answer.cs
new file mode 100644
index 0000000..676f4a3
--- /dev/null
+++ b/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; }
+}
\ No newline at end of file
diff --git a/SurveyLib.Core/Models/QuestionBase.cs b/SurveyLib.Core/Models/QuestionBase.cs
new file mode 100644
index 0000000..822dd75
--- /dev/null
+++ b/SurveyLib.Core/Models/QuestionBase.cs
@@ -0,0 +1,11 @@
+namespace SurveyLib.Core.Models;
+
+public class QuestionBase
+{
+    public int Id { get; set; } // TODO: А ведь их наверное много будет, вдруг int однажды не хватит...
+    public int SurveyId { get; set; }
+    public string Title { get; set; }
+
+    public Survey Survey { get; set; }
+    public ICollection<Answer> Answers { get; set; }
+}
\ No newline at end of file
diff --git a/SurveyLib.Core/Models/Survey.cs b/SurveyLib.Core/Models/Survey.cs
new file mode 100644
index 0000000..e41e948
--- /dev/null
+++ b/SurveyLib.Core/Models/Survey.cs
@@ -0,0 +1,11 @@
+namespace SurveyLib.Core.Models;
+
+public class Survey
+{
+    public int Id { get; set; }
+    public string Title { get; set; }
+    public string Description { get; set; }
+
+    public ICollection<QuestionBase> Questions { get; set; }
+    public ICollection<Answer> Answers { get; set; }
+}
\ No newline at end of file