OxyImage: corrected .NET 3.5 build error (the change was reverted by mistake when adding svg image support)
OxyImage: corrected .NET 3.5 build error (the change was reverted by mistake when
adding svg image support)

Mitch-Connor/oxyplot,Jofta/oxyplot,mattleibow/oxyplot,bbqchickenrobot/oxyplot,H2ONaCl/oxyplot,zur003/oxyplot,freudenthal/oxyplot,NilesDavis/oxyplot,as-zhuravlev/oxyplot_wpf_fork,GeertvanHorrik/oxyplot,lynxkor/oxyplot,Sbosanquet/oxyplot,GeertvanHorrik/oxyplot,br111an/oxyplot,BRER-TECH/oxyplot,svendu/oxyplot,shoelzer/oxyplot,lynxkor/oxyplot,Sbosanquet/oxyplot,objorke/oxyplot,ze-pequeno/oxyplot,lynxkor/oxyplot,oxyplot/oxyplot,shoelzer/oxyplot,Mitch-Connor/oxyplot,shoelzer/oxyplot,jeremyiverson/oxyplot,svendu/oxyplot,freudenthal/oxyplot,objorke/oxyplot,br111an/oxyplot,svendu/oxyplot,DotNetDoctor/oxyplot,olegtarasov/oxyplot,TheAlmightyBob/oxyplot,DotNetDoctor/oxyplot,freudenthal/oxyplot,Sbosanquet/oxyplot,Rustemt/oxyplot,H2ONaCl/oxyplot,Kaplas80/oxyplot,jeremyiverson/oxyplot,bbqchickenrobot/oxyplot,HermanEldering/oxyplot,objorke/oxyplot,br111an/oxyplot,as-zhuravlev/oxyplot_wpf_fork,GeertvanHorrik/oxyplot,Kaplas80/oxyplot,Isolocis/oxyplot,H2ONaCl/oxyplot,olegtarasov/oxyplot,sevoku/oxyplot,mattleibow/oxyplot,sevoku/oxyplot,TheAlmightyBob/oxyplot,bbqchickenrobot/oxyplot,HermanEldering/oxyplot,BRER-TECH/oxyplot,jeremyiverson/oxyplot,TheAlmightyBob/oxyplot,Mitch-Connor/oxyplot,as-zhuravlev/oxyplot_wpf_fork,Jonarw/oxyplot,Rustemt/oxyplot,Rustemt/oxyplot