Added OpenFileDialog.SelectReadOnly Property Value (#10808)

Author: denyshon

xml/System.Windows.Forms/OpenFileDialog.xml

@@ -448,7 +448,8 @@ On a right-to-left operating system, setting the containing form's <xref:System.
       </ReturnValue>
       <Docs>
         <summary>Gets or sets a value indicating whether the dialog box allows selection of read-only files.</summary>
-        <value>To be added.</value>
+        <value>
+          <see langword="true" /> if the dialog box allows selection of read-only files; otherwise, <see langword="false" />. The default value is <see langword="true" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>