Fix for performance issue CA1819

[webhaikal]

For more info: https://msdn.microsoft.com/en-us/library/0fss9skc.aspx

For why this is an issue: http://softwareengineering.stackexchange.com/questions/210922/ca1819-properties-should-not-return-arrays-does-this-happen-only-with-arrays

The commit in question: 2ee41e6