IEnumerable<Role> ListRoles(
	string serviceId = null,
	Nullable<int> marker = null,
	Nullable<int> limit = null,
	CloudIdentity identity = null
)

Function ListRoles ( 
	Optional serviceId As String = Nothing,
	Optional marker As Nullable(Of Integer) = Nothing,
	Optional limit As Nullable(Of Integer) = Nothing,
	Optional identity As CloudIdentity = Nothing
) As IEnumerable(Of Role)

IEnumerable<Role^>^ ListRoles(
	String^ serviceId = nullptr, 
	Nullable<int> marker = nullptr, 
	Nullable<int> limit = nullptr, 
	CloudIdentity^ identity = nullptr
)

abstract ListRoles : 
        ?serviceId : string * 
        ?marker : Nullable<int> * 
        ?limit : Nullable<int> * 
        ?identity : CloudIdentity 
(* Defaults:
        let _serviceId = defaultArg serviceId null
        let _marker = defaultArg marker null
        let _limit = defaultArg limit null
        let _identity = defaultArg identity null
*)
-> IEnumerable<Role> 

IEnumerable<Role> roles = provider.ListRoles();
foreach (var role in roles)
    Console.WriteLine("{0}: {1}", role.Id, role.Name);

Dim roles = provider.ListRoles
For Each role As Role In roles
    Console.WriteLine("{0}: {1}", role.Id, role.Name)
Next

auto roles = provider->ListRoles(nullptr, Nullable<int>(), Nullable<int>(), nullptr);
for each (Role^ role in roles)
    Console::WriteLine("{0}: {1}", role->Id, role->Name);

let roles = provider.ListRoles()
for role in roles do
    Console.WriteLine("{0}: {1}", role.Id, role.Name)