Inline Lambda

• Jun 25, 2019
• 2 minutes to read

Purpose

This refactoring creates a lambda expression and inlines a referenced delegate. If there is only one reference to a delegate method, the Inline Lambda refactoring deletes the delegate method. Use this Refactoring to create the delegate in a lambda syntax.

Availability

Available when the caret is in a method reference within a delegate creation statement.

How to Use

1. Place the caret on a method reference within a delegate creation statement.

   NOTE

   The blinking cursor shows the caret's position at which the Refactoring is available.

C#

namespace Inline {   
    public partial class UserControl1 : UserControl {
        public UserControl1() {
            InitializeComponent();

            Loaded += │UserControl1_Loaded;
        }

        private void UserControl1_Loaded(object sender, RoutedEventArgs e) {
            if(sender != null)
                sender.ToString();
        }
    }
}

VB.NET

Namespace Inline
    Public Partial Class UserControl1
        Inherits UserControl

        Public Sub New()
            InitializeComponent()
            Loaded += AddressOf │UserControl1_Loaded
        End Sub

        Private Sub UserControl1_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If sender IsNot Nothing Then sender.ToString()
        End Sub
    End Class
End Namespace

2. Use the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions Menu.

3. Select Inline Lambda from the menu.

After execution, this Refactoring creates a lambda expression and inlines the referenced delegate.

C#

namespace Inline {   
    public partial class UserControl1 : UserControl {
        public UserControl1() {
            InitializeComponent();

            Loaded += (sender, e) =>
            {
                if (sender != null)
                    sender.ToString();
            };
        }
    }
}

VB.NET

Namespace Inline
    Partial Public Class UserControl1
        Inherits UserControl

        Public Sub New()
            InitializeComponent()
            Loaded += Sub(sender, e) If sender IsNot Nothing Then sender.ToString()
        End Sub
    End Class
End Namespace