add action remove and add for category

LootBoxSimulator/Program.cs

@@ -40,8 +40,28 @@ void ChangeCategory()
 {
     if(!int.TryParse(Console.ReadLine(), out int CategoryID)) return;
     String CategoryName = Console.ReadLine();
-    if(!String.IsNullOrEmpty(CategoryName)) return;
+    if(String.IsNullOrEmpty(CategoryName)) return;
     var categoryDao = db.Categories.Find(CategoryID);
     categoryDao.Name = CategoryName;
     db.SaveChanges();
 }
+
+void RemoveCategory()
+{
+    Console.WriteLine("Please enter a Category ID to remove");
+    if(!int.TryParse(Console.ReadLine(), out int CategoryID)) return;
+    var categoryDao = db.Categories.Find(CategoryID);
+    db.Categories.Remove(categoryDao);
+    db.SaveChanges();
+}
+
+void AddCategory()
+{
+    Console.WriteLine("Please enter a Category Name for new category");
+    String CategoryName = Console.ReadLine();
+    if(String.IsNullOrEmpty(CategoryName)) return;
+    CategoryDao categoryDao = new CategoryDao();
+    categoryDao.Name = CategoryName;
+    db.Categories.Add(categoryDao);
+    db.SaveChanges();
+}