last ...

DI/XDIHelperExtension.cs

@@ -101,6 +101,10 @@ namespace xFileService.DI
                 throw exception;
             }
 
+            //
+            // Register Tag Provider for Files ...
+            services.Add(new ServiceDescriptor(typeof(IXFileTagProvider), typeof(XFileTagProvider), lifeTime));
+
             //
             // Register Main Provider ...
             services.Add(new ServiceDescriptor(typeof(IXFileProvider), typeof(XFileProvider), lifeTime));

Interfaces/IXFileTagProvider.cs

@@ -1,12 +1,8 @@
 using System;
-using System.Collections.Generic;
+using xTagService.Interfaces;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace xFileService.Interfaces
 {
-    public interface IXFileTagProvider
+    public interface IXFileTagProvider : IXBaseTagProvider<Guid>
-    {
+    { }
-        
-    }
 }

Providers/XFileTagProvider.cs

@@ -1,12 +1,20 @@
 using System;
-using System.Collections.Generic;
+using xFileService.Interfaces;
-using System.Linq;
+using xFileService.Models.Entities;
-using System.Threading.Tasks;
+using xTagService.Interfaces;
+using xTagService.Providers;
 
 namespace xFileService.Providers
 {
-    public class XFileTagProvider
+    public class XFileTagProvider : XBaseTagProvider<Guid>, IXFileTagProvider
     {
-        
+        public XFileTagProvider(
+            IXTagProvider tagProvider,
+            string providedFor = nameof(XFile)
+        ) : base(
+            providedFor: providedFor,
+            tagProvider: tagProvider
+        )
+        { }
     }
 }