Hi @sudharsanhcl ,
Welcome to SonarSource community! 
Please take a look at our community guides for assistance:
- [Coverage] Troubleshooting guide for .NET code coverage import
- [Coverage & Test Data] Generate Reports for C#, VB.net
Here is an example pipeline for you compare against that I wrote, this uses VStest and VScoveragexml: https://dev.azure.com/joetingsanchali/_git/sonar-scanning-someconsoleapp?path=%2Fazure-pipelines.yml
If you still have trouble, please show your debug-level logs (adding “sonar.verbose=true” in the extraProperties key of the SonarQubePrepare task) and your azure pipeline.yml.