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C#

Finding and removing items from a text file?

Hey guys, I've built a program that adding info to a text file. Its user database for a record collection, it can add band's info to a text file, but I want to let the user search for and remove band's info if the user sells the band's record. Not sure how to go about this. I'm watching the C# course videos, but thought I could get some other input about other ways of going about it. here is my current code: https://github.com/tsgxcode/OMDB/blob/master/Progarm.cs

Thanks :)