How can I merge two excel files in one file using c#?

How can I merge two excel files in one file using c#?

I want to merge two excel files in one: the first file:
ID Name
1 Mary
2 Tom
3 Mai
the second file:
ID Mark
1 89
2 67
3 56
i want the out put is excel file which is like that:
ID Name Mark
1 Mary 89
2 Tom 67
3 Mai 56
how can i do this in c#?