tag:help.appveyor.com,2012-11-13:/discussions/problems/15393-build-failed-with-csprojmetaproj-warning-msb4078-the-project-file-is-not-supported-by-msbuild-and-cannot-be-builtAppVeyor: Discussion 2018-07-30T18:16:59Ztag:help.appveyor.com,2012-11-13:Comment/458015332018-07-30T18:12:45Z2018-07-30T18:12:45ZBuild failed with error MSB4041: The default XML namespace of the project must be the MSBuild XML namespace.<div><p>So your problem was resolved by switching to dotnet cli?</p></div>Owen McDonnelltag:help.appveyor.com,2012-11-13:Comment/458015332018-07-30T18:16:02Z2018-07-30T18:16:02ZBuild failed with error MSB4041: The default XML namespace of the project must be the MSBuild XML namespace.<div><p>Yes, my problem was resolved by switching to dotnet cli. Thanks.</p></div>ray247tag:help.appveyor.com,2012-11-13:Comment/458015332018-07-30T18:16:59Z2018-07-30T18:16:59ZBuild failed with error MSB4041: The default XML namespace of the project must be the MSBuild XML namespace.<div><p>Ok. Thanks for letting us know.</p></div>Owen McDonnell