I just can't see an equivalent function of $ of VFP in C#.Net. In VFP, I can easily know if a string is existing in another string variable.

mVar = 'ABCDEFZYZ'
?'ABC' $ mVar && returns .T.
?'NMN' $ mVar && returns .F.

How can I do it C#.Net?

Another thing is the macro-substitution? Is it possible in C#.Net?