ReShaper can automatically recognize if states on enums and offer to convert them to switch statements (or back). (Of course, this can only happen
if
switch
For sake of completeness, the option Convert 'if-else' to 'switch' is shown by having the cursor e.g. on the if and then pressing the quick-assist command (Ctrl + 1).
Convert 'if-else' to 'switch'
Ctrl + 1