C# console application IO

Question

i have one folder in that 23 .txt file i want to get 15 to 22  files name and into files this way data so many lines "2014-09-01 00:00:01,500 [INFO] - Send List Count: 160. OK!" so i want that 160 numbers  count in console application 

result :

 

filename(date)  count

 

2014-09-01       35086

2014-09-02       64589

.

.

.

2014-09-15      answer 

.

.

2014-09-22     answer 

 

plzz help me ????