Corrected enum code declaration. (#32854)

* Corrected enum code. Cannot declare:
public enum phylum;
Since this code will produce an error. If someone will copy the same code, it will not compile and run. I updated the code so that when someone will copy the code, it will not produce an error.

* I also updated the spacing and tabbing on code.
* Corrected the constructor DefineAnimal to Animal since the name of the class is Animal and DefineAnimal will produce an error.
* Remove enum on parameter of constructor since this will produce an error.
* Corrected class Dog as public enum breed will produce an error.

guide/english/csharp/inheritance/index.md

@@ -32,15 +32,18 @@ public class Animal
     {
         public int ID;
         public string title;
-	public enum phylum;
-	public enum dietType;
+        public enum phylum { };
+        public enum dietType { };
 
-	    public DefineAnimal(int id, string name, enum phy, enum diet)
+        public phylum _phylum;
+        public dietType _dietType;
+
+        public Animal(int id, string name, phylum phylum, dietType diet)
         {
-        this.ID = id;
+            this.ID = ID;
             this.title = name;
-        this.phylum = phy;
-        this.dietType = diet;
+            this._phylum = phylum;
+            this._dietType = diet;
         }
     }
 	
@@ -50,7 +53,7 @@ public class Animal
 ```
 public class Dog : Animal
     {
-	public enum breed;
+        public enum breed { };
         public int levelOfTraining;
 
         public void SayWoof()