Fix for older versions of Mono, fixes issue #1136.
Fix for older versions of Mono, fixes issue #1136.

duplicati/duplicati,agrajaghh/duplicati,sitofabi/duplicati,klammbueddel/duplicati,AndersGron/duplicati,klammbueddel/duplicati,mnaiman/duplicati,AndersGron/duplicati,a1ezzz/duplicati,agrajaghh/duplicati,sitofabi/duplicati,sitofabi/duplicati,a1ezzz/duplicati,gerco/duplicati,agrajaghh/duplicati,gerco/duplicati,mnaiman/duplicati,agrajaghh/duplicati,sitofabi/duplicati,mnaiman/duplicati,sitofabi/duplicati,mnaiman/duplicati,AndersGron/duplicati,a1ezzz/duplicati,AndersGron/duplicati,mnaiman/duplicati,duplicati/duplicati,klammbueddel/duplicati,klammbueddel/duplicati,AndersGron/duplicati,a1ezzz/duplicati,gerco/duplicati,agrajaghh/duplicati,klammbueddel/duplicati,gerco/duplicati,duplicati/duplicati,gerco/duplicati,a1ezzz/duplicati,duplicati/duplicati,duplicati/duplicati