1 files changed, 19 insertions, 0 deletions

diff --git a/src/api/wix/WixToolset.Extensibility/Services/IFileSystem.cs b/src/api/wix/WixToolset.Extensibility/Services/IFileSystem.cs
index d633c823..26184462 100644
--- a/src/api/wix/WixToolset.Extensibility/Services/IFileSystem.cs
+++ b/src/api/wix/WixToolset.Extensibility/Services/IFileSystem.cs
@@ -2,6 +2,8 @@
 
 namespace WixToolset.Extensibility.Services
 {
+    using System;
+
     /// <summary>
     /// Abstracts basic file system operations.
     /// </summary>
@@ -16,10 +18,27 @@ namespace WixToolset.Extensibility.Services
         void CopyFile(string source, string destination, bool allowHardlink);
 
         /// <summary>
+        /// Deletes a file.
+        /// </summary>
+        /// <param name="source">The file to delete.</param>
+        /// <param name="throwOnError">Indicates the file must be deleted. Default is a best effort delete.</param>
+        /// <param name="maxRetries">Maximum retry attempts. Default is 4.</param>
+        void DeleteFile(string source, bool throwOnError = false, int maxRetries = 4);
+
+        /// <summary>
         /// Moves a file.
         /// </summary>
         /// <param name="source">The file to move.</param>
         /// <param name="destination">The destination file.</param>
         void MoveFile(string source, string destination);
+
+        /// <summary>
+        /// Executes an action and retries on any exception a few times with short pause
+        /// between each attempt. Primarily intended for use with file system operations
+        /// that might get interrupted by external systems (usually anti-virus).
+        /// </summary>
+        /// <param name="action">Action to execute.</param>
+        /// <param name="maxRetries">Maximum retry attempts. Default is 4.</param>
+        void ExecuteWithRetries(Action action, int maxRetries = 4);
     }
 }