Unit test not showing up in SonarQube
Scanning C# projects requires to use the Sonar Scanner for MSBuild and follow a specific 3 steps process which I guess you don't follow for now. See doc about the 3 steps process at: http://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner+for+MSBuild and http://docs.sonarqube.org/display/SCAN/From+Jenkins
Your properties look correct. Yet they shall not be provided in a sonar properties file but instead in the command line arguments of the MSBuild.SonarQube.Runner.exe begin step, for example:
MSBuild.SonarQube.Runner.exe begin <allMandatoryParameters> /d:sonar.cs.nunit.reportsPaths=TestResult.xml /d:sonar.cs.opencover.reportsPaths=reports\opencovertests.xmlOlivier