Assertion in Selenium C#

Assertion in Selenium is used for Asserting the given input value with the content or value available on the webpage. If the given value with the value on the webpage matches then we will return the true value otherwise we will return false.

For example : In Wikipedia webpage my requirement is to check the word availability within the content witht my given input value so we will implement Assert.BodyText Assertion.
 
With this Assertion we will check the given value within the paragraph.

Some of commonly used assertion in Selenium are here>>