Merge pull request dotnet#5224 from dotnet/Tanya-Solyanik-patch-1

Updated example section for MouseEventArgs

Author: Tanya-Solyanik

xml/System.Windows.Forms/MouseEventArgs.xml

@@ -39,7 +39,7 @@
    
   
 ## Examples  
- The following code examples handles the <xref:System.Windows.Forms.Control.MouseDown> event on a <xref:System.Windows.Forms.TextBox> control so that clicking the right mouse button selects all the text in the control. This example requires that you have a form that contains a <xref:System.Windows.Forms.TextBox> control that is named `textBox1`.  
+ The following code example handles the <xref:System.Windows.Forms.Control.MouseDown> event on a <xref:System.Windows.Forms.TextBox> control so that clicking the right mouse button selects all the text in the control. This example requires that you have a form that contains a <xref:System.Windows.Forms.TextBox> control that is named `textBox1`.  
   
  [!code-csharp[MouseEventArgs#1](~/samples/snippets/csharp/VS_Snippets_Winforms/MouseEventArgs/CS/Form1.cs#1)]
  [!code-vb[MouseEventArgs#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/MouseEventArgs/VB/Form1.vb#1)]