Fix FluentWindow behaviour · lepoco/wpfui@2889cba

Missing XML comment for publicly visible type or member 'Toast'

Missing XML comment for publicly visible type or member 'Toast.Show()'

Nullability of type of parameter 'parameter' doesn't match overridden member (possibly because of nullability attributes).

Non-nullable field 'szTip' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'szInfo' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'szInfoTitle' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference return.

Possible null reference return.

Possible null reference return.

Possible null reference return.

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