In this comprehensive guide, automation testers are introduced to handling frames and iFrames using Selenium C# during automated browser testing. The tutorial provides detailed instructions on using the SwitchTo() command to navigate between nested frames and iFrames, essential for managing web pages that incorporate content from various sources. Key techniques include identifying frames using unique window handles and switching between frames and iFrames using frame name, ID, or web locators. The guide also covers handling multiple browser windows and frames, and highlights practical scenarios with a focus on nested frames and iFrames, demonstrating methods for effectively switching between them. The author, Himanshu Sheth, brings over 15 years of experience and shares insights to enhance the understanding of Selenium test automation, supported by examples and video tutorials for practical application.