Create a Corba Client against IBM Websphare Geronimo Community Edition
Download the Websphare community edition and install it on your PC.
start the webshare server and login the administration console.
click "Install System Modules" under Application subtree folder.
start the ServerCorba module (geronimo/j2ee-corba/1.0/car) as follow:

"Install System Modules" screen dump

choose "Deploy Now" under Application subtree folder. 

select your EJB application jar in the upper field and 
the deployment plan for the EJB application in the lower field. 
Lastly, click the "Install" button as follow:

"Deploy New" screen dump

Create IDL file for the EJB remote interfaces:

Generate .Net Corba stub files as follow:

Create the Corba client as follow: