How to run command prompt with UAC rights using C#?

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C#3.5

I am trying since long to run command prompt with UAC rights i.e it must be similar as user right click and run as administrator.

Also I want to execute set of command

for eg:

net user administrator /active:yes
net user administrator passowrd

the above command will execute only if the user runs cmd.exe as run as administrator.
I am not getting how to do this programmatically.

I tried with below command

runas /savecred /profile /user:Administrator "net user administrator /active:yes"

but it asks for administrator password which does not exist as the account is not active.

Basically I want to do is that my program should call cmd.exe with prompting UAC "i.e Run as administrator" and then the user should ckick yes and the command

<pre>
net user administrator /active:yes
net user administrator passowrd
</pre>

should run in which case it does not require administrator password