diff --git a/UserManagement.MVC/Controllers/UserRolesController.cs b/UserManagement.MVC/Controllers/UserRolesController.cs
index 973e724..0e4767e 100644
--- a/UserManagement.MVC/Controllers/UserRolesController.cs
+++ b/UserManagement.MVC/Controllers/UserRolesController.cs
@@ -46,7 +46,7 @@ public async Task<IActionResult> Manage(string userId)
             }
             ViewBag.UserName = user.UserName;
             var model = new List<ManageUserRolesViewModel>();
-            foreach (var role in _roleManager.Roles)
+            foreach (var role in _roleManager.Roles.ToList())
             {
                 var userRolesViewModel = new ManageUserRolesViewModel
                 {