void Warn(
	LoggerCategory category,
	Func<string> messageGenerator
)

Sub Warn ( 
	category As LoggerCategory,
	messageGenerator As Func(Of String)
)

void Warn(
	LoggerCategory category, 
	Func<String^>^ messageGenerator
)

abstract Warn : 
        category : LoggerCategory * 
        messageGenerator : Func<string> -> unit