To solve the problem, module-level suppressions can be used. In any other source file of the project, the following statement can be used (must be right after the using directives):
[module: SuppressMessage("Microsoft.Performance", "CA1819:PropertiesShouldNotReturnArrays", Justification = "Generated code",
Scope = "member", Target = "FlightPlanning.AoiSchema.ListViewTable.#Items")]
The difficulty is finding the right name for the Target, because it must be an exact fully qualified string. Luckily, the FxCop gui offers help to generate the correct message: Just right-click the error, select "Copy-As" and choose "Module level Suppression"