{"action":"opened","issue":{"url":"https://api.github.com/repos/Microsoft/msbuild/issues/249","labels_url":"https://api.github.com/repos/Microsoft/msbuild/issues/249/labels{/name}","comments_url":"https://api.github.com/repos/Microsoft/msbuild/issues/249/comments","events_url":"https://api.github.com/repos/Microsoft/msbuild/issues/249/events","html_url":"https://github.com/Microsoft/msbuild/issues/249","id":109835574,"number":249,"title":"PropertyFunctionGenericListReturn fails in xplat","user":{"login":"rainersigwald","id":3347530,"avatar_url":"https://avatars.githubusercontent.com/u/3347530?v=3","gravatar_id":"","url":"https://api.github.com/users/rainersigwald","html_url":"https://github.com/rainersigwald","followers_url":"https://api.github.com/users/rainersigwald/followers","following_url":"https://api.github.com/users/rainersigwald/following{/other_user}","gists_url":"https://api.github.com/users/rainersigwald/gists{/gist_id}","starred_url":"https://api.github.com/users/rainersigwald/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rainersigwald/subscriptions","organizations_url":"https://api.github.com/users/rainersigwald/orgs","repos_url":"https://api.github.com/users/rainersigwald/repos","events_url":"https://api.github.com/users/rainersigwald/events{/privacy}","received_events_url":"https://api.github.com/users/rainersigwald/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Microsoft/msbuild/labels/up-for-grabs","name":"up-for-grabs","color":"009800"},{"url":"https://api.github.com/repos/Microsoft/msbuild/labels/xplat","name":"xplat","color":"fbca04"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-10-05T16:23:05Z","updated_at":"2015-10-05T16:23:05Z","closed_at":null,"body":"This test is expected to return the string `\"A;B;C;D\"` but actually returns `\"System.Collections.Generic.List`1[System.String]\"`.  Clearly we've changed something to cause a `List<string>` to not get flattened, but it's not immediately obvious where.  I was suspicious of changes from 1da7bfd to `Expander`, but since the test fails on both full-framework and Core, that doesn't appear to be the problem."}}