title: How to delete specific files from the Source folder using delete task in Azure devOps
body: <p>I am trying to add a task to delete files with specific type from source folder and all the sub folders using delete task in Azure DevOps pipeline. </p>
  
  <p>Delete task: 
  <a href="https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/delete-files?view=azure-devops" rel="noreferrer">https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/delete-files?view=azure-devops</a> doesn't seem to provide any information on the patterns. </p>
  
  <p>I have tried following combinations but none of them worked. 
  <em>(.xyz)
  (</em>.xyz)
  *.xyz
  *.xyz\</p>
  
  <p>my expectation is to delete files with .xyz type from all the sub folders.</p>