public abstract bool TryGetExtension<T>(
	out T extension
)
where T : class, IExtension

Public MustOverride Function TryGetExtension(Of T As {Class, IExtension}) ( 
	<OutAttribute> ByRef extension As T
) As Boolean

public:
generic<typename T>
where T : ref class, IExtension
virtual bool TryGetExtension(
	[OutAttribute] T% extension
) abstract

abstract TryGetExtension : 
        extension : 'T byref -> bool  when 'T : not struct and IExtension