anchor.diff:      FCurBlockPos := 0;
       if FCurBlock = FLast then
       begin
  -<<<<<<< HEAD
         if Len > MPool.FBlockSize then//һˣҳ˿С
           SetSize(FPosition + Len)
         else if FPosition + Len > FSize then
  -=======
  -      if FPosition + Len > FSize then
  ->>>>>>> parent of 9bf7227... Modify DxMemoryStream
           FSize := FPosition + Len;
       end;
     end;
  
positive.code:       FCurBlockPos := 0;
        if FCurBlock = FLast then
        begin
  <<<<<<< HEAD
          if Count > MPool.FBlockSize then//һ飬ҳ˿С
  =======
          if Count > MPool.FBlockSize then //ѾһĴС
  >>>>>>> parent of 9bf7227... Modify DxMemoryStream
            SetSize(FPosition + Count)
          else if FPosition + Count > FSize then
            FSize := FPosition + Count;
  
negative.code:     FCurBlockPos := 0;
      if FCurBlock = FLast then
      begin
        if Count > MPool.FBlockSize then//һ飬ҳ˿С
          SetSize(FPosition + Count)
        else if FPosition + Count > FSize then
          FSize := FPosition + Count;
  