c#函数记录

Geometry .StrokeContainsWithDetail Method

Returns a value that describes the intersection between the specified geometry and the current geometry's stroke.

UIElement .InvalidateVisual Method

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Invalidates the rendering of the element, and forces a complete new layout pass. OnRender is called after the layout cycle is completed.

Remarks

This method calls InvalidateArrange internally.

This method is not generally called from your application code. The WPF framework-level layout system does its own handling of changes in the visual tree of an element, and would be calling the equivalent of this method when necessary already. Calling this method is necessary only for advanced scenarios. One such advanced scenario is if you are creating a PropertyChangedCallback for a dependency property that is not on a Freezable or FrameworkElement derived class that still influences the layout when it changes.

Action <T> Delegate

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Encapsulates a method that has a single parameter and does not return a value.

When you use the Action <T > delegate, you do not have to explicitly define a delegate that encapsulates a method with a single parameter. For example, the following code explicitly declares a delegate named DisplayMessage and assigns a reference to either the WriteLine method or the ShowWindowsMessage method to its delegate instance.

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JScript

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using System;
using System.Windows.Forms;

delegate void DisplayMessage(string message);

public class TestCustomDelegate
{
   public static void Main()
   {
      DisplayMessage messageTarget; 

      if (Environment.GetCommandLineArgs().Length > 1)
         messageTarget = ShowWindowsMessage;
      else
         messageTarget = Console.WriteLine;

      messageTarget("Hello, World!");   
   }      

   private static void ShowWindowsMessage(string message)
   {
      MessageBox.Show(message);      
   }
}

[System.Diagnostics.DebuggerNonUserCodeAttribute()]

如果一个工程是以release方式进行编译构建的话（就是工程中，没有pdb文件），调试器会将其认为是非用户代码，那么在调试运行时，就根本不会进入该工程中进行调试。其次，可以使用System.Diagnostics命名空间里的DebuggerNonUserCodeAttribute属性，将其应用在希望不进行调试的代码段中。

Visibility Enumeration

Member name	Description
	Visible	Display the element.
	Hidden	Do not display the element, but reserve space for the element in layout.
	Collapsed	Do not display the element, and do not reserve space for it in layout.

	Member name	Description
	Visible	Display the element.
	Hidden	Do not display the element, but reserve space for the element in layout.
	Collapsed	Do not display the element, and do not reserve space for it in layout.

Remarks

Elements that have a Visibility value of Collapsed do not occupy any layout space. By default, elements are Visible

Member name	Description
	Visible	Display the element.
	Hidden	Do not display the element, but reserve space for the element in layout.
	Collapsed	Do not display the element, and do not reserve space for it in layout.