howdy mike morton here program manager on the visual studio team my team typically works on the container tools inside of visual studio and visual studio code but today i'm going to show you something a little different this feature i'm going to show you is great for you.net core developers that are using visual studio so let me just go ahead and jump right in and show you what this is i have a new asp.net core application that i created i'm just going to open up the index page here and add a little snippet to this and we'll let intellisense help me here and basically what i'll show is i'm just going to print out the os version so i'll go ahead and click to debug this in is express and my application will start up and you'll see that we'll print out the os version which as expected is microsoft windows nt basically we're running in windows but often when you're building a net core application your target environment will be a linux and uh machine so one way to do that is to use container debugging and that's great and that works extremely well for many situations but we've created a lighter weight scenario if i go here now in the drop down you'll see i have an option to use wsl 2 to debug my.net core application in so if i just switch that debug target and go ahead and click on the green arrow to start debugging again what you'll see is when my application starts up that environment os version is actually a linux environment we're debugging from windows inside of a linux distribution inside of wsl2 so i can have that great productivity of visual studio but i can also test my application right inside of linux what uh actually happens when you select that wsl 2 is you'll see we update our launch settings and we add an additional launch setting for wsl2 and you'll notice here the distribution name by default is left blank i can actually set that to a specific distribution name if i want otherwise if you leave it blank we'll go ahead and use the default distribution that you've set up on your machine if needed you can actually have multiple launch targets if you'd like so i'll go ahead and copy that and i'll put a comma there and just paste in a second version here and what i'll do is i'll set this to debian which is not my default and then i'll set the that's just the friendly name and then i'll set the distribution name also to debian and if i wanted to i could set this one because i know my default is ubuntu i could set that to ubuntu if i wanted to and by leaving this blank again we'll use the default distribution if i go ahead and save that now you'll see up here in my drop down i now have a misspelled ubuntu we'll go ahead and fix that real quick save that again and we'll see that i have ubuntu and debian so let's go ahead and switch to debian and just to show you that debugging works let me go ahead and set a breakpoint there and we'll go ahead and start the debugger and this time our tools will do the the linux debugging inside the debian distro rather than the ubuntu distro and here you can see that we have our linux environment as expected i can hit continue and of course i'm debugging inside of linux if you'd like to try out the new wsl2 debugging head on over to the visual studio extension gallery or the marketplace and install the.net core debugging with wsl2 it's currently in preview and we'd love to get your feedback so if you don't mind go ahead and click download and then when you restart visual studio you'll be presented with the wsl2 options like i showed you here today all right thank you very much have a great day
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