How to show database values in order wise using c#

Question

Hai ,

 

In my project , I want to display all the database values of serialno in one textbox  .

For an example

 I don't want to display like this below serios, 

Serial No :

1 

10         

11

12

13

2

20

21

22

3

4

 

I want to display this serialno order in :

This is what I want to display this number,

Serial no:

 1

2

3

4

5

6

7

8

9

10

11

12

13

14

.

.

.

20

21

22

.

.

.30

.

.n

 

How can I do this in my project , Please somebody help me to overcome this problem.