Sorting incoming text data file in C# by a range of the record -

i have file coming in (for display in textbox).

var lines = new [] {     "123465.xxx.20150115",     "123465.xxx.20150222",     "999999.xxx.20150120", };  

i can't affect sorted order receive in. however, want sort column 12 column 19, column 1 thru 6 (by date number) - in reverse order.

currently call dos sort (.bat) on file creating new file, there has way sort in c#.

i want sort in textbox or load array, sort it, load textbox.

try this:

var lines = new [] {     "123465.xxx.20150115",     "123465.xxx.20150222",     "999999.xxx.20150120", };   var sorted =     lines         .orderbydescending(l => l.substring(11, 8) + l.substring(0, 6))         .toarray(); 

since string indexing 0-based .substring(11, 8) gives "column 12 column 19" & .substring(0, 6) gives "column 1 thru 6".

i result: