create project and solution
change .gitignore for C#
add NUnit NuGet package
rename StringSearch to S...S...TestCasesProvider
introduce Case<T>
introduce A
remove 'ReSharper restore' comment
introduce AA
introduce AAA
introduce AAAAAA
Case folderup
add TestCasesProvider.Exists
implement Exists.A__TestCases
implement Exists.AA_TestCases
implement Exists.AAA__TestCases
implement All__TestCases
add TestCasesProvider.FindFirst
implement FindFirst.A__TetsCases
add TestCaseProvider.FindLast
implement FindLast.A__TestCases