'updating a list using linq C#

I have list in which I want to update is active flag from all user like

userList:[
    {'name':'a', isActive:'Y'},
    {'name':'b', isActive:'N'},
    {'name':'c', isActive:'Y'},
    {'name':'d', isActive:'N'},
];

I want to change isActive from Y to N and from N to Y, my updated list will look like below

userList:[
    {'name':'a', isActive:'N'},
    {'name':'b', isActive:'Y'},
    {'name':'c', isActive:'N'},
    {'name':'d', isActive:'Y'},
];

how can I achieve this?

c++sharp linq

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