List Multi-Sorting

I have a list that I would like to sort in multiple ways.

My List is made using this:

theMainList.Add(new LoadLine(theChipList[count].Name, theChipList[count].PartNumber, 
                theChipList[count].XPlacement, theChipList[count].YPlacement, 
                theChipList[count].Rotation, theChipList[count].PkgStyle, 
                theChipList[count].PackageType, theChipList[count].PartDescription,
                theChipList[count].Feeder, theChipList[count].Vision,
                theChipList[count].Speed, theChipList[count].Machine,
                theChipList[count].TapeWidth, theChipList[count].PlacingTime));

I start off by getting each line using foreach(var line in theMainList).

Now, for each line I need to compare certain positions and sort them accordingly.

So, FIRST what I would like to compare is each line.Speed and organize the list nume开发者_运维技巧rically (so if the speeds were 1,2,3,4,5, etc the first line in the list would be the line that has the line.Speed equal to 1, and then 2, etc.)

SECOND I would like to sort the updated list that is now in order of line.Speed again. I would like to sort the line.PackageStyle in the order of this:

"FIDUCIAL", "FID", "FID0", "FID1", "FID2", "FID3", "FID4", "FID5",
"FID6", "FID7", "FID8", "FID9", "RES", "0402", "0201", "0603", 
"0805","1206", "1306", "1608", "3216", "2551", "1913", "1313",
"2513","5125", "2525", "5619", "3813", "1508", "6431", "2512",
"1505","2208", "1005", "1010", "2010", "0505", "0705", "1020",
"1812","2225", "5764", "4532", "1210", "0816", "0363", "SOT"

THIRD I would like to sort the new updated list with the Speed sorted first, and then thee PackageStyle sorted secondly...by the line.PartNumber. Again this would be numerically just like the line.Speed was.

Is there any way to do this mulitple sorting technique?

Use Linq's OrderBy() and ThenBy() methods:

theMainList.OrderBy(l => l.Speed)
           .ThenBy(l => l.PackageStyle)
           .ThenBy(l => l.PartNumber);

You should be able to accomplish this using the OrderBy and ThenBy extension methods available in the System.Linq namespace. E.g.,

var sortedList = theMainList
   .OrderBy(l => l.Speed)
   .ThenBy(l => l.PackageStyle)
   .ThenBy(l => l.PartNumber);

Keep in mind you might need to override the default comparisons using IComparer. See MSDN for more info.