Add basic memento pattern

src/MememntoPattern/Employee/Employee.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace MememntoPattern.Employee
+{
+    /// <summary>
+    /// Originator
+    /// </summary>
+    public class Employee
+    {
+        public string Name { get; set; }
+
+        public string Address { get; set; }
+
+        public List<String> Phones { get; set; }
+
+        public EmployeeMemento Save()
+        {
+            return new EmployeeMemento(Name, Address);
+        }
+
+        public void Revert(EmployeeMemento memento)
+        {            
+            Name = memento.Name;
+            Address = memento.Address;
+        }
+    }
+}