Improve samples

docs/core/docker/snippets/App/Program.cs

@@ -1,9 +1,16 @@
 var counter = 0;
-var max = args.Length is not 0 ? Convert.ToInt32(args[0]) : -1;
 
-while (max is -1 || counter < max)
+// If a number is passed as a command-line argument,
+// it will be used as the maximum counter value.
+var max = args.Length > 0 && int.TryParse(args[0], out var parsedMax)
+    ? parsedMax
+    : -1;
+
+// Run indefinitely if no max value is provided
+while (max == -1 || counter < max)
 {
     Console.WriteLine($"Counter: {++counter}");
 
-    await Task.Delay(TimeSpan.FromMilliseconds(1_000));
+    // Wait for one second between iterations
+    await Task.Delay(TimeSpan.FromSeconds(1));
 }

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

@@ -4,23 +4,32 @@ namespace ExpressionBodiedMembers;
 
 public class Person
 {
+   private string fname;
+   private string lname;
+
    public Person(string firstName, string lastName)
    {
       fname = firstName;
       lname = lastName;
    }
 
-   private string fname;
-   private string lname;
+   public string FirstName { get; set }
+
+   public string LastName { get; set }
+
+   /// <summary>
+   /// Add some changes in methods
+   /// </summary>
+   /// <returns></returns>
 
-   public override string ToString() => $"{fname} {lname}".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} {fname} {lname}";
+   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}", fname).Replace("{last}", lname);
+   public string FormatName(string format) => format.Replace("{first}", FirstName).Replace("{last}", LastName);
 }
 
 class Example