Add expression-bodied members examples with parameters (#47035)

* Initial plan

* Add expression-bodied members examples with parameters

Co-authored-by: BillWagner <493969+BillWagner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: BillWagner <493969+BillWagner@users.noreply.github.com>

Author: Copilot

docs/csharp/programming-guide/statements-expressions-operators/expression-bodied-members.md

@@ -29,7 +29,7 @@ Expression body definitions can be used with the following type members:
 
 An expression-bodied method consists of a single expression that returns a value whose type matches the method's return type, or, for methods that return `void`, that performs some operation. For example, types that override the <xref:System.Object.ToString%2A> method typically include a single expression that returns the string representation of the current object.
 
-The following example defines a `Person` class that overrides the <xref:System.Object.ToString%2A> method with an expression body definition. It also defines a `DisplayName` method that displays a name to the console. The `return` keyword is not used in the `ToString` expression body definition.
+The following example defines a `Person` class that overrides the <xref:System.Object.ToString%2A> method with an expression body definition. It also defines a `DisplayName` method that displays a name to the console. Additionally, it includes several methods that take parameters, demonstrating how expression-bodied members work with method parameters. The `return` keyword is not used in any of the expression body definitions.
 
 [!code-csharp[expression-bodied-methods](../../../../samples/snippets/csharp/programming-guide/classes-and-structs/ExpressionBodiedMembers/expr-bodied-methods.cs)]
 
@@ -69,7 +69,7 @@ For more information about events, see [Events (C# Programming Guide)](../events
 
 An expression body definition for a constructor typically consists of a single assignment expression or a method call that handles the constructor's arguments or initializes instance state.
 
-The following example defines a `Location` class whose constructor has a single string parameter named *name*. The expression body definition assigns the argument to the `Name` property.
+The following example defines a `Location` class whose constructor has a single string parameter named *name*. The expression body definition assigns the argument to the `Name` property. The example also shows a `Point` class with constructors that take multiple parameters, demonstrating how expression-bodied constructors work with different parameter combinations.
 
 [!code-csharp[expression-bodied-constructor](../../../../samples/snippets/csharp/programming-guide/classes-and-structs/ExpressionBodiedMembers/expr-bodied-ctor.cs#1)]
 

samples/snippets/csharp/programming-guide/classes-and-structs/ExpressionBodiedMembers/Program.cs

@@ -1,2 +1,2 @@
 // See https://aka.ms/new-console-template for more information
-ExprBodied.Example.Main();
+ExpressionBodiedMembers.Example.Main();

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

@@ -15,6 +15,19 @@ public string Name
       set => locationName = value;
    }
 }
+
+// Example with multiple parameters
+public class Point
+{
+   public double X { get; }
+   public double Y { get; }
+   
+   // Constructor with multiple parameters
+   public Point(double x, double y) => (X, Y) = (x, y);
+   
+   // Constructor with single parameter (creates point at origin on axis)
+   public Point(double coordinate) => (X, Y) = (coordinate, 0);
+}
 // </Snippet1>
 
 public class Example
@@ -23,5 +36,11 @@ public static void Main()
    {
       var city = new Location("New York City");
       Console.WriteLine(city.Name);
+      
+      // Examples with multiple constructor parameters
+      var point1 = new Point(3.0, 4.0);
+      var point2 = new Point(5.0);
+      Console.WriteLine($"Point 1: ({point1.X}, {point1.Y})");
+      Console.WriteLine($"Point 2: ({point2.X}, {point2.Y})");
    }
 }

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

@@ -15,14 +15,26 @@ public Person(string firstName, string lastName)
 
    public override string ToString() => $"{fname} {lname}".Trim();
    public void DisplayName() => Console.WriteLine(ToString());
+   
+   // Expression-bodied methods with parameters
+   public string GetFullName(string title) => $"{title} {fname} {lname}";
+   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);
 }
 
 class Example
 {
-   static void Main()
+   public static void Main()
    {
       Person p = new Person("Mandy", "Dejesus");
       Console.WriteLine(p);
       p.DisplayName();
+      
+      // Examples with parameters
+      Console.WriteLine(p.GetFullName("Dr."));
+      Console.WriteLine($"Age: {p.CalculateAge(1990)}");
+      Console.WriteLine($"Is older than 25: {p.IsOlderThan(25)}");
+      Console.WriteLine(p.FormatName("Last: {last}, First: {first}"));
    }
 }