Update Lesson 4 Task 1

Lesson_4/Task_1/Customer.cs

@@ -18,42 +18,4 @@
             Console.WriteLine($"Your balance is: {Balance}");
         }
     }
-
-    public class CustomerList
-    {
-        public List<Customer> Customers = new List<Customer>()
-        {
-            new Customer(1, "Fikus", 0),
-            new Customer(2, "VHarbar", 100000)
-        };
-
-        public decimal? GetBalanceById(int id)
-        {
-            var customer = Customers.FirstOrDefault(x => x.Id == id);
-            if (customer != null)
-                return customer.Balance;
-            else
-                return null;
-        }
-
-        public Customer? GetById(int id)
-        {
-            return Customers.FirstOrDefault(x => x.Id == id);
-        }
-
-        public void SaveToDatabase()
-        {
-            Console.WriteLine("Saved!");
-        }
-
-        public void UpdateBalance(int id, decimal newBalance)
-        {
-            var customer = GetById(id);
-            if (customer != null)
-            {
-                customer.Balance = newBalance;
-                SaveToDatabase();
-            }
-        }
-    }
 }

Lesson_4/Task_1/CustomerList.cs

@@ -0,0 +1,35 @@
+namespace SingleResponsibility
+{
+    public class CustomerList
+    {
+        public List<Customer> Customers = new List<Customer>()
+        {
+            new Customer(1, "Fikus", 0),
+            new Customer(2, "VHarbar", 100000)
+        };
+
+        public decimal? GetBalanceById(int id)
+        {
+            var customer = Customers.FirstOrDefault(x => x.Id == id);
+            if (customer != null)
+                return customer.Balance;
+            else
+                return null;
+        }
+
+        public Customer? GetById(int id)
+        {
+            return Customers.FirstOrDefault(x => x.Id == id);
+        }
+
+        public void UpdateBalance(int id, decimal newBalance)
+        {
+            var customer = GetById(id);
+            if (customer != null)
+            {
+                customer.Balance = newBalance;
+                (new Database()).SaveToDatabase();
+            }
+        }
+    }
+}

Lesson_4/Task_1/Database.cs

@@ -0,0 +1,10 @@
+namespace SingleResponsibility
+{
+    public class Database
+    {
+        public void SaveToDatabase()
+        {
+            Console.WriteLine("Saved!");
+        }
+    }
+}