Step 1: Download Selenium Core, Selenium IDE and Selenium RC from the website http://seleniumhq.org/download/
Step 2: Installing the IDE. It consists of an XPI file that needs to be added in Firefox.
Step 3: Unzip the Selenium RC folder.
Step 4: To record Scripts, Open the IDE. To run the Selenium IDE, open Firefox and Select it from Firefox tools menu. Refer the screenshot below.
After recording the script, select C# format to convert the scrip in C# format.
Step 7: Build the application.