XML comment has syntactically incorrect cref attribute 'true'

Identifier expected; 'true' is a keyword. See also error CS1041.

XML comment has badly formed XML -- 'An identifier was expected.'

XML comment has badly formed XML -- 'Expected an end tag for element 'summary'.'

XML comment has syntactically incorrect cref attribute 'https://developer.android.com/intl/ru/training/accessibility/accessible-app.html'

XML comment has badly formed XML -- 'The character(s) '=' cannot be used at this location.'

XML comment has syntactically incorrect cref attribute 'https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIAccessibilityIdentification_Protocol/index.html'

XML comment has syntactically incorrect cref attribute 'false'

Identifier expected; 'false' is a keyword. See also error CS1041.