.net - Cast IEnumerable(Of String) to my sub-classed List(Of String) -

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i have class inherits list:

public class textlines : inherits list(of string)   end class

now, how can cast return value of type ienumerable(of string) custom class?

real example of i'm trying do:

dim lines textlines lines = ctype(file.readalllines(me.filepathb, me.encodingb).tolist, textlines)

it throws invalid cast exception.

why don't this?

dim lines new textlines() lines.addrange(file.readalllines(me.filepathb, me.encodingb));

or expose constructor takes ienumerable<t>?


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