This code
FileOpen(1, "file:///C:/Users/MyName/Desktop/Test%20%C3%A4%C3%B6%C3%BC%20Test.txt", OpenMode.Input)
throws
System.ArgumentException: 'URI formats are not supported.'
How can I open a file using th URI format? Changing the filename in the code above is not an option, it is delivered by
AppDomain.CurrentDomain.SetupInformation.ActivationArguments.ActivationData