two networks to talk to each other

Use a VPN

Site to site VPN, cross vendor isn't difficult.

thanks guys, i'm in a sutuation here the option is to do static route?  any advise or how to?

what ive done so far is:  between the two routers, i have a pnp network switch and on each pc or pc that needs to go accross i've done a persistent route where:
on 192.168.1.x
Network Address          Netmask  Gateway Address  Metric
        0.0.0.0          0.0.0.0   192.168.200.79  Default
        0.0.0.0          0.0.0.0      192.168.1.1  Default
    192.168.1.1  255.255.255.255      192.168.2.1       1
    192.168.2.1  255.255.255.255      192.168.1.1       1
--------------
192.168.2.x

192.168.2.1  255.255.255.255  192.168.1.1      1
0.0.0.0   0.0.0.0                             192.168.2.1   default
192.168.1.1   255.255.255.255    192.168.2.1 1
192.168.2.1   255.255.255.255   192.168.2.1 1

Your routes need to be configured on the firewalls
You didn't specify the subnet mask for each but I'll assume they're both /24
I'll assume the ASA is 202.123.123.123 wile the Sonicwall is202.123.123.122
I'll assume also that the asa and sonicwall can ping each other

On the asa
ip route 192.168.2.0 255.255.255.0 202.122.122.122

On sonicwall (not sure the exact command for sonicwalls but the concept is the same)
ip route 192.168.1.0 255.255.255.0 202.122.122.123

awsomely sounds there, Akinsd!  let me give it  a shut and see how it goes!

Hi there,

Is the communication happening over the internet?

Static routes along with site to site VPN configuration would be the best recommended way to securely communicate from one site to another.

The below link will guide you through the procedure of setting this UP:
http://www.ponjavic.com/wordpress/2013/11/18/site-to-site-vpn-between-a-sonicwall-firewall-and-cisco-asa-5505/

all other comments are good just that the solution i have is a lot lot simmpler...