Check that value exists in a Generic List of Values

Question

I am trying to figure out how to check if testInt exists in all Car.SomeID in List

So:

int testInt = 10;
List myCars = GetCars();
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Answer 1

myCars.Exists(c => c.SomeID == 10);

Answer 2

In the more general case, with LINQ (supports any type of abstract typed list):

bool hasCar = myCars.Any(c => c.SomeID == testInt);