Object notation formatter should ignore ArgumentCount property

[zspitz]

Describe the bug
When using the object notation formatter, the ArgumentCount property should not be displayed.

To Reproduce

var lst = new List<string>();
var lmbd = Lambda(
    Call(
        typeof(Enumerable).GetMethod("Distinct"),
        Convert(lst,
            typeof(IEnumerable<string>)
        )
    )
);
lmbd.ToString("Object notation");