Utils

Mix two hash code to produce a new hash code

Code

消影：

消影

忘记加的WM_SETREDRAW值了：
public const int WM_SETREDRAW = 0x000B;

抓起Dump文件：

Code

详细可见：如何让程序抓到dump文件，MiniDumpWriteDump 一文

Timer (摘自《CLR Via C#》)

Timer

// This class is useful for doing operation performance timing
internal sealed class OperationTimer : IDisposable
{
     private Int64 m_startTime;
     private String m_text;
     private Int32 m_collectionCount;
     public OperationTimer(String text)
     {
         PrepareForOperation();
         m_text = text;
         m_collectionCount = GC.CollectionCount(0);
         // This should be the last statement in this
         // method to keep timing as accurate as possible
         m_startTime = Stopwatch.GetTimestamp();
     }
     public void Dispose()
     {
         Console.WriteLine("{0,6:###.00} seconds (GCs={1,3}) {2}", (Stopwatch.GetTimestamp() - m_startTime) / (Double)Stopwatch.Frequency,
                                                                    GC.CollectionCount(0) - m_collectionCount, m_text);
     }
     private static void PrepareForOperation()
     {
         GC.Collect();
         GC.WaitForPendingFinalizers();
         GC.Collect();
     }
}