asp.net WPF merry-go text scrolling custom control

The code is as follows

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Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Using System.Windows.Controls; Using System.ComponentModel; Using System.Drawing; Using System.Timers; Using System.Windows; Namespace Wpfdemonew.control { <summary> Label Merry-go Custom Control </summary> [ToolboxBitmap (typeof (Label)]//Set icon displayed in Toolbox public class Scrollingtextcontrol:label { <summary> Timer </summary> Timer Marqueetimer = new timer (); <summary> Scrolling text source </summary> String _textsource = "scrolling text source"; <summary> Output text </summary> String _outtext = String. Empty; <summary> Scrolling speed of text </summary> Double _runspeed = 1000;        ///<summary>        / Constructor        ///</summary>          public Scrollingtextcontrol ()         {              Marqueetimer.interval = _runspeed;//The speed of text movement              marqueetimer.enabled = true;      Turn on timed trigger event             marqueetimer.elapsed + = new Elapsedeventhandler (marqueetimer_elapsed);//Bind timed event              this. Loaded + = new Routedeventhandler (scrollingtextcontrol_loaded);//Bound Control Loaded event         }         void scrollingtextcontrol_loaded (object sender, RoutedEventArgs E )         {              _textsource = setcontent;             _outtext = _textsource + "  ";        }         void Marqueetimer_elapsed (object sender, Elapsedeventargs e) { if (string. IsNullOrEmpty (_outtext)) return; _outtext = _outtext.substring (1) + _outtext[0]; Dispatcher.begininvoke (() The New Action (() => { SetContent = _outtext; })); } <summary> Speed of scrolling </summary> [Description (Speed of text scrolling)]//Show description in property Design view Public double Runspeed { get {return _runspeed;} Set { _runspeed = value; Marqueetimer.interval = _runspeed; } }        ///<summary>        / Scrolling text source        ///</summary>          [Description (Speed of text scrolling)]         public string TextSource         {              get {return _textsource;}             Set              {                  _textsource = value;                 _outtext = _ TextSource;            }        } private String SetContent { get {return content.tostring ();} Set { Content = value; } } } }

The above is placed in the CS file and then compiled to see the Scrollingtextcontrol name Label control in the Toolbox

The code is as follows

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<window x:class= "Wpfdemonew.window21"         xmlns= "http://schemas.microsoft.com /winfx/2006/xaml/presentation "         xmlns:x=" http:// Schemas.microsoft.com/winfx/2006/xaml "         title=" Window21 "height=" "Width=" xmlns:my= "Clr-namespace:wpfdemonew.control" "     <grid x:name=" Grid ">         <my:scrollingtextcontrol content= "12345" height= "52" Horizontalalignment= "left" margin= "10,10,0,0" x:name= "ScrollingTextControl1" verticalalignment= "Top" width= "121" Foreground= "Black"/>     </grid> </window>