C# 7 and .NET Core Cookbook

Sanitizing input

Sometimes, you will need to sanitize input. This could be to prevent SQL injections or ensure that an entered URL is valid. In this recipe, we will look at replacing the bad words in a string with asterisks. We are sure that there are more elegant and code-efficient methods of writing sanitation logic using regex (especially when we have a large collection of blacklist words), but we want to illustrate a concept here.