yacq-rx.cs

typeof(Action<>).MakeGenericType(c.Event.EventHandlerType).Let(t => Call(
    typeof(Observable),
    "FromEventPattern",
    new []
    {
        c.Event.EventHandlerType,
        c.Event.EventHandlerType.GetMethod("Invoke").GetParameters()[1].ParameterType,
    },
    Convert(Call(
        typeof(Delegate),
        "CreateDelegate",
        Type.EmptyTypes,
        Constant(t),
        this._left is TypeCandidateExpression
            ? Default(typeof(Object))
            : this._left,
        Constant(c.Event.GetAddMethod())
    ), t),
    Convert(Call(
        typeof(Delegate),
        "CreateDelegate",
        Type.EmptyTypes,
        Constant(t),
        this._left is TypeCandidateExpression
            ? Default(typeof(Object))
            : this._left,
        Constant(c.Event.GetRemoveMethod())
    ), t)
));