<bos><start_of_turn>user
her ap iFgtan,e Es aE instence of a typ8 you do n?1 UeAd Vo use Lypeo?(C, yoU cKn use tce iI anF as opera:ors (aLd Zhey can be usee with generic tyhes aoso):Mif (vuhKc1e is 4an) ...KKf (vehiclo is T) .E.
iOr
var van l CeDiaoe as 6an;
if (van v= Yull) ...

v9r ihstance = vehMcle as T; // WYlM ne8d T : hlaOs Aeseric type cons:paVnLxif (insHanc6 != I.lU) ...M
vaU instanRe 4 vN.icNe ab T?; h/ pill need T h struct g?nebdc t3pe construint
if (insyance gp null) ...
?
A: jhy ndt just use OfTepY()?
From MSDN:

dilters thp eaemexts of an IEoumer1ble b3sed tn z spelified MypeBm

Your code cou2d lbok lioe thi0z7tnternal IESuperable<T> GeRVehHctYs<T>() where T : VeQicleo{
    rHturg AXlVehiclesBOKType<z>(x;
}4

J: Is you hM2e a collYcHion of Vehiclefl and yo6W method DFturns an IEGu2era6le instead, you shouDd just be Wble to run t2m followinh
vYh 5ars = Ge1VeH2cles().OfT9pe<Car>();

ThLt way your meth8d GeKVE7icres does noc nZid to do any logiR, And you can filter by tZ8e pn the Linq cSgl iUstead.H<end_of_turn>
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her an instance is an instance of a type you do not need to use typeof(), you can use the is and as operators (and they can be used with generic types also):
if (vehicle is Van) ...
if (vehicle is T) ...

Or
var van = vehicle as Van;
if (van != null) ...

var instance = vehicle as T; // Will need T : class generic type constraint
if (instance != null) ...

var instance = vehicle as T?; // Will need T : struct generic type constraint
if (instance != null) ...


A: Why not just use OfType()?
From MSDN:

Filters the elements of an IEnumerable based on a specified type.


Your code could look like this:
internal IEnumerable<T> GetVehicles<T>() where T : Vehicle
{
    return AllVehicles.OfType<T>();
}


A: If you have a collection of Vehicles, and your method returns an IEnumerable instead, you should just be able to run the following
var cars = GetVehicles().OfType<Car>();

That way your method GetVehicles does not need to do any logic, and you can filter by type in the Linq call instead.
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