c# - ASP.Net Web Application - Is there a best practice method for where to keep connection strings? -

The real question: Is it a webpage on the webpage? The best practice to store clear text connection strings in the config file is to be considered in the ASP.Net web application:

Background:
Developing a web application that I can install on various sites The application wants to be capable (where I only have plain text edits) the app requires many connection strings (which is apparently different depending on which app deployed the app Interpretation) So I web. I want to be able to store all connection strings (with username and password) in the config / P>

is the best practice