Archives

• ToolTip ToolTip toolTip

  Saturday, September 21, 2019

  English WPF

  No Comments

  While working on a WPF control that handles some aspects of its (optional) tooltip programmatically, I wrote the following lines:

  if (ToolTip is ToolTip toolTip)
  {
    // … do something with toolTip …
  }

  This makes perfect sense and isn’t confusing inside Visual Studio (because of syntax highlighting), but made me smile nevertheless.

  ---

  Explanation:

  • The code uses the “is” shorthand introduced in C# 7 that combines testing for “not null” and the desired type with declaring a corresponding variable (I love it!).
  • The first “ToolTip” is the control’s ToolTip property (FrameworkElement.ToolTip), which is of type “object”.
  • The second “ToolTip” is the class “System.Windows.Control.ToolTip”.