C#: create a do-nothing Action on class instantiation [duplicate]

Answer 1

Shouldn't it be curly brackets?

public FooClass()
        : this(o => {})
    {
    }

Lambda form is (/*paramaters*/) => {/*body*}

Parenthesis around the parameters can be omitted, but Curly braces around the body can be omitted only if it's a single (not empty) statement.