Refactor Person class properties and methods

Refactor properties to use expression-bodied members and remove 'this' references for clarity.

Author: ivanPeshterskii

samples/snippets/csharp/programming-guide/classes-and-structs/ExpressionBodiedMembers/expr-bodied-methods.cs

@@ -9,46 +9,27 @@ public class Person
 
    public Person(string firstName, string lastName)
    {
-      // Add 'this' to each property for better clarification
-      this.fname = firstName;
-      this.lname = lastName;
+      fname = firstName;
+      lname = lastName;
    }
 
-   // Add public properties
+   public string FirstName { get; private set }
 
-   public string FirstName
-   {
-      get => this.fname;
-
-      private set
-      {
-         this.fname = value;
-      }
-   }
-
-   public string LastName
-   {
-      get => this.lname;
-
-      private set
-      {
-         this.lname = value;
-      }
-   }
+   public string LastName { get; private set }
 
    /// <summary>
    /// Add some changes in methods
    /// </summary>
    /// <returns></returns>
 
-   public override string ToString() => $"{this.FirstName} {this.LastName}".Trim();
+   public override string ToString() => $"{FirstName} {LastName}".Trim();
    public void DisplayName() => Console.WriteLine(ToString());
 
    // Expression-bodied methods with parameters
-   public string GetFullName(string title) => $"{title} {this.FirstName} {this.LastName}";
+   public string GetFullName(string title) => $"{title} {FirstName} {LastName}";
    public int CalculateAge(int birthYear) => DateTime.Now.Year - birthYear;
    public bool IsOlderThan(int age) => CalculateAge(1990) > age;
-   public string FormatName(string format) => format.Replace("{first}", this.FirstName).Replace("{last}", this.LastName);
+   public string FormatName(string format) => format.Replace("{first}", FirstName).Replace("{last}", LastName);
 }
 
 class Example
@@ -65,4 +46,4 @@ public static void Main()
       Console.WriteLine($"Is older than 25: {p.IsOlderThan(25)}");
       Console.WriteLine(p.FormatName("Last: {last}, First: {first}"));
    }
-}
+}