Tidy up InteractiveWindow.cs
Tidy up InteractiveWindow.cs

e.g. Use expression-bodied properties for brevity and explicit interface
implementation to make it clearer which methods are API members.

jeffanders/roslyn,managed-commons/roslyn,thomaslevesque/roslyn,aanshibudhiraja/Roslyn,xasx/roslyn,orthoxerox/roslyn,CaptainHayashi/roslyn,rchande/roslyn,tmat/roslyn,russpowers/roslyn,tvand7093/roslyn,mirhagk/roslyn,genlu/roslyn,oocx/roslyn,Giftednewt/roslyn,dotnet/roslyn,jaredpar/roslyn,pjmagee/roslyn,thomaslevesque/roslyn,leppie/roslyn,amcasey/roslyn,MihaMarkic/roslyn-prank,BugraC/roslyn,magicbing/roslyn,yjfxfjch/roslyn,devharis/roslyn,hanu412/roslyn,evilc0des/roslyn,natgla/roslyn,3F/roslyn,lisong521/roslyn,moozzyk/roslyn,weltkante/roslyn,nemec/roslyn,yeaicc/roslyn,bkoelman/roslyn,jhendrixMSFT/roslyn,mavasani/roslyn,sharwell/roslyn,tmat/roslyn,VPashkov/roslyn,davkean/roslyn,mattscheffer/roslyn,kelltrick/roslyn,swaroop-sridhar/roslyn,DustinCampbell/roslyn,leppie/roslyn,jonatassaraiva/roslyn,antonssonj/roslyn,Pvlerick/roslyn,reaction1989/roslyn,pdelvo/roslyn,balajikris/roslyn,jroggeman/roslyn,eriawan/roslyn,jamesqo/roslyn,zooba/roslyn,yeaicc/roslyn,nemec/roslyn,RipCurrent/roslyn,huoxudong125/roslyn,YOTOV-LIMITED/roslyn,VitalyTVA/roslyn,antiufo/roslyn,mattscheffer/roslyn,CyrusNajmabadi/roslyn,AmadeusW/roslyn,YOTOV-LIMITED/roslyn,zmaruo/roslyn,nagyistoce/roslyn,gafter/roslyn,oocx/roslyn,devharis/roslyn,HellBrick/roslyn,krishnarajbb/roslyn,CyrusNajmabadi/roslyn,brettfo/roslyn,tannergooding/roslyn,KamalRathnayake/roslyn,physhi/roslyn,khellang/roslyn,antiufo/roslyn,ericfe-ms/roslyn,OmarTawfik/roslyn,RipCurrent/roslyn,aelij/roslyn,CaptainHayashi/roslyn,panopticoncentral/roslyn,khyperia/roslyn,michalhosala/roslyn,robinsedlaczek/roslyn,abock/roslyn,MichalStrehovsky/roslyn,yeaicc/roslyn,mavasani/roslyn,HellBrick/roslyn,lisong521/roslyn,3F/roslyn,jeremymeng/roslyn,lisong521/roslyn,DustinCampbell/roslyn,akrisiun/roslyn,chenxizhang/roslyn,sharadagrawal/Roslyn,taylorjonl/roslyn,vslsnap/roslyn,dpoeschl/roslyn,ljw1004/roslyn,kienct89/roslyn,bartdesmet/roslyn,russpowers/roslyn,SeriaWei/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,enginekit/roslyn,tmeschter/roslyn,KevinH-MS/roslyn,basoundr/roslyn,basoundr/roslyn,jbhensley/roslyn,brettfo/roslyn,ErikSchierboom/roslyn,paulvanbrenk/roslyn,Pvlerick/roslyn,diryboy/roslyn,VSadov/roslyn,mseamari/Stuff,poizan42/roslyn,jcouv/roslyn,KirillOsenkov/roslyn,TyOverby/roslyn,zooba/roslyn,Giftednewt/roslyn,VitalyTVA/roslyn,stephentoub/roslyn,KiloBravoLima/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,magicbing/roslyn,ilyes14/roslyn,danielcweber/roslyn,physhi/roslyn,kienct89/roslyn,krishnarajbb/roslyn,VSadov/roslyn,evilc0des/roslyn,oberxon/roslyn,Maxwe11/roslyn,jhendrixMSFT/roslyn,jasonmalinowski/roslyn,FICTURE7/roslyn,TyOverby/roslyn,heejaechang/roslyn,mattwar/roslyn,tannergooding/roslyn,AnthonyDGreen/roslyn,swaroop-sridhar/roslyn,agocke/roslyn,bkoelman/roslyn,BugraC/roslyn,genlu/roslyn,abock/roslyn,jmarolf/roslyn,bartdesmet/roslyn,eriawan/roslyn,KamalRathnayake/roslyn,natgla/roslyn,jeremymeng/roslyn,3F/roslyn,mattscheffer/roslyn,ericfe-ms/roslyn,Hosch250/roslyn,dpoeschl/roslyn,CyrusNajmabadi/roslyn,hanu412/roslyn,dovzhikova/roslyn,oberxon/roslyn,SeriaWei/roslyn,ilyes14/roslyn,dotnet/roslyn,akrisiun/roslyn,jkotas/roslyn,rchande/roslyn,agocke/roslyn,tang7526/roslyn,GuilhermeSa/roslyn,YOTOV-LIMITED/roslyn,AnthonyDGreen/roslyn,sharadagrawal/Roslyn,vslsnap/roslyn,xoofx/roslyn,xoofx/roslyn,wvdd007/roslyn,poizan42/roslyn,cston/roslyn,balajikris/roslyn,bbarry/roslyn,v-codeel/roslyn,srivatsn/roslyn,KirillOsenkov/roslyn,KamalRathnayake/roslyn,ahmedshuhel/roslyn,srivatsn/roslyn,mattwar/roslyn,AmadeusW/roslyn,huoxudong125/roslyn,jbhensley/roslyn,dovzhikova/roslyn,srivatsn/roslyn,sharwell/roslyn,balajikris/roslyn,stebet/roslyn,VSadov/roslyn,bartdesmet/roslyn,OmarTawfik/roslyn,BugraC/roslyn,supriyantomaftuh/roslyn,bkoelman/roslyn,swaroop-sridhar/roslyn,cston/roslyn,tang7526/roslyn,shyamnamboodiripad/roslyn,AlekseyTs/roslyn,oocx/roslyn,doconnell565/roslyn,aelij/roslyn,xasx/roslyn,HellBrick/roslyn,nguerrera/roslyn,kelltrick/roslyn,doconnell565/roslyn,Inverness/roslyn,sharwell/roslyn,tang7526/roslyn,tmeschter/roslyn,jamesqo/roslyn,khyperia/roslyn,nagyistoce/roslyn,ErikSchierboom/roslyn,Inverness/roslyn,ValentinRueda/roslyn,chenxizhang/roslyn,poizan42/roslyn,jeffanders/roslyn,GuilhermeSa/roslyn,jaredpar/roslyn,ValentinRueda/roslyn,VitalyTVA/roslyn,Maxwe11/roslyn,reaction1989/roslyn,dovzhikova/roslyn,leppie/roslyn,jkotas/roslyn,KevinH-MS/roslyn,mattwar/roslyn,orthoxerox/roslyn,KirillOsenkov/roslyn,TyOverby/roslyn,stebet/roslyn,jmarolf/roslyn,paulvanbrenk/roslyn,devharis/roslyn,AArnott/roslyn,a-ctor/roslyn,DustinCampbell/roslyn,xasx/roslyn,orthoxerox/roslyn,AlexisArce/roslyn,yjfxfjch/roslyn,MatthieuMEZIL/roslyn,AnthonyDGreen/roslyn,ljw1004/roslyn,diryboy/roslyn,agocke/roslyn,genlu/roslyn,tannergooding/roslyn,jroggeman/roslyn,AlexisArce/roslyn,wvdd007/roslyn,MattWindsor91/roslyn,nagyistoce/roslyn,ErikSchierboom/roslyn,huoxudong125/roslyn,VShangxiao/roslyn,VShangxiao/roslyn,robinsedlaczek/roslyn,AArnott/roslyn,panopticoncentral/roslyn,AmadeusW/roslyn,jcouv/roslyn,shyamnamboodiripad/roslyn,EricArndt/roslyn,paulvanbrenk/roslyn,akrisiun/roslyn,grianggrai/roslyn,Hosch250/roslyn,dpoeschl/roslyn,antonssonj/roslyn,sharadagrawal/Roslyn,reaction1989/roslyn,MihaMarkic/roslyn-prank,supriyantomaftuh/roslyn,EricArndt/roslyn,heejaechang/roslyn,natgla/roslyn,xoofx/roslyn,FICTURE7/roslyn,pdelvo/roslyn,enginekit/roslyn,nemec/roslyn,drognanar/roslyn,rgani/roslyn,lorcanmooney/roslyn,v-codeel/roslyn,MichalStrehovsky/roslyn,mseamari/Stuff,budcribar/roslyn,aanshibudhiraja/Roslyn,ilyes14/roslyn,Shiney/roslyn,basoundr/roslyn,kelltrick/roslyn,MattWindsor91/roslyn,jbhensley/roslyn,danielcweber/roslyn,diryboy/roslyn,mirhagk/roslyn,a-ctor/roslyn,jonatassaraiva/roslyn,managed-commons/roslyn,bbarry/roslyn,CaptainHayashi/roslyn,yjfxfjch/roslyn,wvdd007/roslyn,jcouv/roslyn,rgani/roslyn,weltkante/roslyn,robinsedlaczek/roslyn,AlexisArce/roslyn,ahmedshuhel/roslyn,ahmedshuhel/roslyn,chenxizhang/roslyn,managed-commons/roslyn,MichalStrehovsky/roslyn,VPashkov/roslyn,Shiney/roslyn,Pvlerick/roslyn,physhi/roslyn,mgoertz-msft/roslyn,thomaslevesque/roslyn,mirhagk/roslyn,GuilhermeSa/roslyn,a-ctor/roslyn,jonatassaraiva/roslyn,MatthieuMEZIL/roslyn,OmarTawfik/roslyn,mgoertz-msft/roslyn,KevinRansom/roslyn,ericfe-ms/roslyn,jhendrixMSFT/roslyn,jasonmalinowski/roslyn,ljw1004/roslyn,zmaruo/roslyn,taylorjonl/roslyn,pjmagee/roslyn,supriyantomaftuh/roslyn,jasonmalinowski/roslyn,budcribar/roslyn,mseamari/Stuff,VShangxiao/roslyn,michalhosala/roslyn,KevinRansom/roslyn,zooba/roslyn,magicbing/roslyn,vcsjones/roslyn,oberxon/roslyn,nguerrera/roslyn,bbarry/roslyn,drognanar/roslyn,grianggrai/roslyn,MattWindsor91/roslyn,evilc0des/roslyn,amcasey/roslyn,jamesqo/roslyn,mgoertz-msft/roslyn,amcasey/roslyn,MatthieuMEZIL/roslyn,KevinH-MS/roslyn,AArnott/roslyn,eriawan/roslyn,MihaMarkic/roslyn-prank,RipCurrent/roslyn,pjmagee/roslyn,FICTURE7/roslyn,gafter/roslyn,danielcweber/roslyn,michalhosala/roslyn,Giftednewt/roslyn,MattWindsor91/roslyn,abock/roslyn,shyamnamboodiripad/roslyn,doconnell565/roslyn,tvand7093/roslyn,natidea/roslyn,KiloBravoLima/roslyn,stephentoub/roslyn,natidea/roslyn,weltkante/roslyn,davkean/roslyn,cston/roslyn,vcsjones/roslyn,hanu412/roslyn,enginekit/roslyn,Shiney/roslyn,lorcanmooney/roslyn,aanshibudhiraja/Roslyn,vcsjones/roslyn,davkean/roslyn,mmitche/roslyn,jmarolf/roslyn,brettfo/roslyn,khellang/roslyn,KiloBravoLima/roslyn,EricArndt/roslyn,v-codeel/roslyn,pdelvo/roslyn,antiufo/roslyn,ValentinRueda/roslyn,vslsnap/roslyn,antonssonj/roslyn,mavasani/roslyn,russpowers/roslyn,Inverness/roslyn,krishnarajbb/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,nguerrera/roslyn,tvand7093/roslyn,khellang/roslyn,Maxwe11/roslyn,stebet/roslyn,taylorjonl/roslyn,mmitche/roslyn,jeremymeng/roslyn,mmitche/roslyn,panopticoncentral/roslyn,lorcanmooney/roslyn,KevinRansom/roslyn,gafter/roslyn,rgani/roslyn,stephentoub/roslyn,VPashkov/roslyn,Hosch250/roslyn,jkotas/roslyn,AlekseyTs/roslyn,moozzyk/roslyn,tmat/roslyn,rchande/roslyn,dotnet/roslyn,jeffanders/roslyn,kienct89/roslyn,moozzyk/roslyn,jroggeman/roslyn,khyperia/roslyn,SeriaWei/roslyn,zmaruo/roslyn,jaredpar/roslyn,tmeschter/roslyn,grianggrai/roslyn,budcribar/roslyn,heejaechang/roslyn,natidea/roslyn,drognanar/roslyn,aelij/roslyn,AlekseyTs/roslyn