How to get DbSet

Let's say that I have

DBContext principal = new DBContext();
var x = principal.GetType().GetProperty("SomeClass").GetType();

I now have the PropertyInfo of DbSet< SomeClass >

What I'm trying to do now is somehow iterate (convert to list for example) and get the values from each row in the table.

imagine I could do this:

x[0] // would be the 0th entery in DbSet<SomeClass>, the first row aka of type SomeClass

From here I would know how to further drill down and access properties (using the same principle as above)