Revert "Add the virtual parameter to properties"

If we use virtual properties the objects can't get transfered.
This reverts commit e7faf6ce82.

Server/Server/Models/City.cs

@@ -22,7 +22,7 @@ namespace Server.Models
         [DataMember]
         public int ZipCode { get => _ZipCode; set => _ZipCode = value; }
         [DataMember]
-        public virtual Country Country { get => _Counry; set => _Counry = value; }
+        public Country Country { get => _Counry; set => _Counry = value; }
 
         public City() { }
         public City (string name, int zipCode, Country country)

Server/Server/Models/Doctor.cs

@@ -27,4 +27,4 @@ namespace Server.Models
             this.City = city;
         }
     }
-}
+}

Server/Server/Models/Exam.cs

@@ -21,11 +21,11 @@ namespace Server.Models
         [DataMember]
         public DateTime Date { get => _Date; set => _Date = value; }
         [DataMember]
-        public virtual Doctor Doctor { get => _Doctor; set => _Doctor = value; }
+        public Doctor Doctor { get => _Doctor; set => _Doctor = value; }
         [DataMember]
-        public virtual Person Patient { get => _Patient; set => _Patient = value; }
+        public Person Patient { get => _Patient; set => _Patient = value; }
         [DataMember]
-        public virtual Result Result { get => _Result; set => _Result = value; }
+        public Result Result { get => _Result; set => _Result = value; }
 
         public Exam() { }
         public Exam (Doctor doctor, Person patient, Result result)

Server/Server/Models/Person.cs

@@ -25,13 +25,13 @@ namespace Server.Models
         [DataMember]
         public string LastName { get => _LastName; set => _LastName = value; }
         [DataMember]
-        public virtual Gender Gender { get => _Gender; set => _Gender = value; }
+        public Gender Gender { get => _Gender; set => _Gender = value; }
         [DataMember]
-        public virtual Salutation Salutation { get => _Salutation; set => _Salutation = value; }
+        public Salutation Salutation { get => _Salutation; set => _Salutation = value; }
         [DataMember]
         public string StreetName { get => _StreetName; set => _StreetName = value; }
         [DataMember]
-        public virtual City City { get => _City; set => _City = value; }
+        public City City { get => _City; set => _City = value; }
 
         public Person() { }
         public Person (string firstName, string lastName, Gender gender, Salutation salutation,

Server/Server/Models/Result.cs

@@ -22,7 +22,7 @@ namespace Server.Models
         [DataMember]
         public string Description { get => _Description; set => _Description = value; }
         [DataMember]
-        public virtual Strain Strain { get => _Strain; set => _Strain = value; }
+        public Strain Strain { get => _Strain; set => _Strain = value; }
 
         public Result() { }
         public Result (string name, string description, Strain strain)
@@ -32,4 +32,4 @@ namespace Server.Models
             this.Strain = strain;
         }
     }
-}
+}