Remove extra line breaks in Visual Studio

I often find that I copied some files online.CodePasted into Visual Studio, there will be a lot of extra line breaks. I did not elaborate on the reason. It should be related to the HTML encode method of the webpage. Maybe it is because it encodes \ r \ n into two BRs. For a small amount of code, such as dozens of lines, we can delete a row, but it is miserable when the amount is large. I tried to use a tool to solve this problem more than once, but I was not happy to take the time to do it. After studying it today, we found that we can replace it with a regular expression, which is perfect. For example: