Действие с DisplayName="<var>X</var>" содержит аргумент с именем "<var>Y</var>", который является Message или MessageContract. Метод SendParametersContent не поддерживает Message и MessageContract. Свойство Content должно быть указано как SendMessageContent для Message или MessageContract.

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Activity with DisplayName='<var>X</var>' has an argument named '<var>Y</var>' that is a Message or MessageContract. SendParametersContent does not support Message or MessageContract. Content property should be specified as SendMessageContent for Message or MessageContract based content.

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