Никита. Создал классы-интерфейсы моделей

Polyclinic/PolyclinicDataModels/Models/ICourseModel.cs

@@ -0,0 +1,11 @@
+namespace PolyclinicDataModels.Models
+{
+    public interface ICourseModel
+    {
+        int DaysCount { get; }
+        int PillsPerDay { get; }
+        string Comment { get; }
+        Dictionary<int, IDiagnosisModel> CourseDiagnosis { get; }
+        Dictionary<int, IRecipeModel> CourseRecipes { get; }
+    }
+}

Polyclinic/PolyclinicDataModels/Models/IDiagnosisModel.cs

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+namespace PolyclinicDataModels.Models
+{
+    public interface IDiagnosisModel
+    {
+        string Name { get; }
+        string Comment { get; }
+    }
+}

Polyclinic/PolyclinicDataModels/Models/ISymptomModel.cs

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+namespace PolyclinicDataModels.Models
+{
+    public interface ISymptomModel : IId
+    {
+        string Name { get; }
+        string Comment { get; }
+        Dictionary<int, IDiagnosisModel> SymptomDiagnosis { get; }
+        Dictionary<int, IRecipeModel> SymptomRecipes { get; }
+    }
+}