Contains("<<Something") doesn't return true while it should

[Ellerbach]

Details about Problem

nanoFramework area: C# code

VS version: (2017 | 2019 )

VS extension version:

Target:

Device capabilities output:

Description

Issue with string.Contains for a specific character string.

Detailed repro steps so we can see the same problem

const string C9PatternMainStyle = "<<Main>$>g__";
string mtName = "<<Main>$>g__MethodCalbackTest|0_3";
if (mtName.Contains(C9PatternMainStyle))
{
  // We should arrive here but Contains doesn't find it!
}

Notes:

• Works: mtName.Contains("Main>$>"))
• Does not work: mtName.Contains("<<Main"))

Other suggested things

Expected behaviour

Sample Project

Screenshot

Additional context

I've made an effort to fix the bug

[josesimoes]

Our API currently has no Contains(...) and friends. We should look into adding these.
Most of them can (are) pure C# code, so they won't "cost" anything in native size increase.

[Ellerbach]

You're right :-) My bad :-D It's an extension I have and the issue is in the extension! Found my issue.

[josesimoes]

Almost ready. Just adding a pile of unit tests 😜