WriteFile example seems to be missing a class reference

[martinboers]

Reported in the PLCnext Community, here:

https://www.plcnext-community.net/forum/#/discussion/3308/file-handling-c

The C# code in the following file (part of the File Handling example) references a Utils class, which is not part of the example.

https://github.com/PLCnext/CSharpExamples/blob/master/PLCnext_CSharpExamples/08_FileHandling/WriteFile.cs

This appears to be referring to the Utils class defined here:

https://github.com/PLCnext/CSharpExamples/blob/master/PLCnext_CSharpExamples/Utils.cs

Please update the File Handling example(s) to make it clear how to include the Utils class in this example.

Thanks!