Fixed sluggish editor behavior by removing Conditional Attribute optimization from design-time mode
Fixed sluggish editor behavior by removing Conditional Attribute optimization from design-time mode

yonglehou/WebApi,abkmr/WebApi,lungisam/WebApi,abkmr/WebApi,congysu/WebApi,scz2011/WebApi,LianwMS/WebApi,congysu/WebApi,yonglehou/WebApi,lewischeng-ms/WebApi,chimpinano/WebApi,lewischeng-ms/WebApi,chimpinano/WebApi,lungisam/WebApi,LianwMS/WebApi,scz2011/WebApi