While loop that hangs on "strange" characters

[enkelmedia]

Hi!

Just wanted to share a strange issue that we had.

Some visitor on our forum posted this symbol as content ➗ , which actually made the code end up in an endless loop on this row:

mvcforum/MVCForum.Core/Utilities/StringUtils.cs

Line 383 in a336249

while (tmpStr.IndexOf(" ") != -1)

It seems like the replace-method don't replace the " " when this character is there, in our case the CPU usage went to 99% after hitting a topic in the forum with this sign. Removing the sign from the post content i the database OR removing the while loop above solved the issue.

I also don't understand why the while loop is there? The Replace-method in C# will replace all occurrences of the search string in one call (https://docs.microsoft.com/en-us/dotnet/api/system.string.replace?view=netframework-4.7.2).

So to avoid these ever lasting loops I would remove the while-loop from the methods that is counting words.

All the best!

// Markus