Public Shared Function Lambda(Of TDelegate) ( _
    body As Expression, _
    ParamArray parameters As ParameterExpression() _
) As Expression(Of TDelegate)

Dim body As Expression
Dim parameters As ParameterExpression()
Dim returnValue As Expression(Of TDelegate)

returnValue = Expression.Lambda(body, parameters)

public static Expression<TDelegate> Lambda<TDelegate>(
    Expression body,
    params ParameterExpression[] parameters
)

public:
generic<typename TDelegate>
static Expression<TDelegate>^ Lambda(
    Expression^ body, 
    ... array<ParameterExpression^>^ parameters
)

JScript does not support generic types or methods.