String extension for Contains, with StringComparison

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So, many of the built in string methods have the possibility to set the StringComparison in code, to for example OrdinalIgnoreCase wich is my favorite for most back-end processing.
Sad thing is, the Contains does not have it. So here is a small extension that fixes it with the help of IndexOf method

Some source-code (C#) to copy into your utilities class.

public static bool Contains(this string s, string sub, StringComparison comparison)
{
    return s.IndexOf(sub, comparison) != -1;
}

Hope this helps someone out there :)

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