Fix C# tutorial code line
Fix C# tutorial code line

MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials,MyPureCloud/developercenter-tutorials