Worst Abstraction Inversion

var selectedTextBox = (TextBox)sender,
if (IsAdmin)
{
    selectedTextBox.Enabled = true;
    selectedTextBox.Text = superSecretPassword;
}
else
{
    selectedTextBox.Clear();
}

Cast<TextBox>(sender).
    WithIf(IsAdmin,
        With(selectedTextBox => selectedTextBox.Enabled = true).
        With(selectedTextBox => selectedTextBox.Text = superSecretPassword),
        With(selectedTextBox => selectedTextBox.Clear());

interface foo {
    int bar();
}

class myClass1 implements foo {
    // No member variables.

    int bar() {
        // Implementation
    }

    // No other methods.
}

class myClass2 implements foo {
    // No member variables.

    int bar() {
        // Implementation
    }

    // No other methods.
}