gistfile1.cs

    class UserInfoPanel : Panel
    {
        public UserInfoPanel()
        {
            var layout = new DynamicLayout(this);

            layout.Add(new Label
            {
                Text = "User Info",
                Font = new Font(SystemFont.Bold, 15)
            });

            layout.Add(new Label
            {   
                Text = "User Age"
            });

            TextBox userNameBox = new TextBox();
            userNameBox.PlaceholderText = "Insert Age";
            layout.Add(userNameBox);
        }
    }