diff --git a/AsbCloudApp/Repositories/IUserRoleRepository.cs b/AsbCloudApp/Repositories/IUserRoleRepository.cs
index 177e4379..a2c25704 100644
--- a/AsbCloudApp/Repositories/IUserRoleRepository.cs
+++ b/AsbCloudApp/Repositories/IUserRoleRepository.cs
@@ -18,7 +18,7 @@ namespace AsbCloudApp.Repositories
         /// <param name="names"></param>
         /// <param name="token"></param>
         /// <returns></returns>
-        Task<IEnumerable<UserRoleDto>?> GetByNamesAsync(IEnumerable<string> names, CancellationToken token = default);
+        Task<IEnumerable<UserRoleDto>> GetByNamesAsync(IEnumerable<string> names, CancellationToken token = default);
 
         /// <summary>
         /// получить все вложенные разрешения
@@ -26,7 +26,7 @@ namespace AsbCloudApp.Repositories
         /// <param name="id"></param>
         /// <param name="counter"></param>
         /// <returns></returns>
-        IEnumerable<UserRoleDto>? GetNestedById(int id, int counter = 10);
+        IEnumerable<UserRoleDto> GetNestedById(int id, int counter = 10);
 
         /// <summary>
         /// определяет содержится ли разрешение в одной из указанных ролей
diff --git a/AsbCloudInfrastructure/Repository/UserRepository.cs b/AsbCloudInfrastructure/Repository/UserRepository.cs
index 1ba7f006..5c3e990b 100644
--- a/AsbCloudInfrastructure/Repository/UserRepository.cs
+++ b/AsbCloudInfrastructure/Repository/UserRepository.cs
@@ -1,7 +1,6 @@
 using AsbCloudApp.Data;
 using AsbCloudApp.Exceptions;
 using AsbCloudApp.Repositories;
-using AsbCloudApp.Services;
 using AsbCloudDb;
 using AsbCloudDb.Model;
 using AsbCloudInfrastructure.EfCache;
@@ -136,20 +135,20 @@ namespace AsbCloudInfrastructure.Repository
             return count;
         }
 
-        public IEnumerable<UserRoleDto>? GetRolesByIdUser(int idUser, int nestedLevel = 0)
+        public IEnumerable<UserRoleDto> GetRolesByIdUser(int idUser, int nestedLevel = 0)
         {
             var roles = GetCachRelationUserUserRoleCacheTag().Where(r => r.IdUser == idUser);
             if (roles is null)
-                return null;
+                return Enumerable.Empty<UserRoleDto>();
 
             return roles.SelectMany(r => userRoleRepository.GetNestedById(r.IdUserRole, nestedLevel));
         }
 
-        public IEnumerable<PermissionDto>? GetNestedPermissions(int idUser)
+        public IEnumerable<PermissionDto> GetNestedPermissions(int idUser)
         {
             var roles = GetRolesByIdUser(idUser, 7);
             if (roles is null)
-                return null;
+                return Enumerable.Empty<PermissionDto>(); ;
             var permissions = roles
                 .Where(r => r.Permissions is not null)
                 .SelectMany(r => r.Permissions);
@@ -162,12 +161,13 @@ namespace AsbCloudInfrastructure.Repository
             if (idUser == 1)
                 return true;
 
-            var relationsToRoles = GetCachRelationUserUserRoleCacheTag().Where(r => r.IdUser == idUser);
+            var relationsToRoles = GetCachRelationUserUserRoleCacheTag()
+                .Where(r => r.IdUser == idUser);
             if (relationsToRoles is null)
                 return false;
 
-            return userRoleRepository.HasPermission(relationsToRoles.Select(r => r.IdUserRole),
-                                                        permissionName);
+            return userRoleRepository.HasPermission(relationsToRoles
+                .Select(r => r.IdUserRole), permissionName);
         }
 
         private IEnumerable<string>? GetRolesNamesByIdUser(int idUser)
diff --git a/AsbCloudInfrastructure/Repository/UserRoleRepository.cs b/AsbCloudInfrastructure/Repository/UserRoleRepository.cs
index 596ecfca..1c34f14a 100644
--- a/AsbCloudInfrastructure/Repository/UserRoleRepository.cs
+++ b/AsbCloudInfrastructure/Repository/UserRoleRepository.cs
@@ -53,13 +53,12 @@ namespace AsbCloudInfrastructure.Repository
             var entities = await  GetCacheUserRoleAsync(token)
                 .ConfigureAwait(false);
 
-            if (entities is not null)
-            {
-                var dtos = entities.Select(Convert);
-                return dtos;
-            }
-            else 
-                return new List<UserRoleDto>();
+            if (entities is null)
+                return Enumerable.Empty<UserRoleDto>();
+
+            var dtos = entities.Select(Convert);
+            return dtos;
+
         }
 
         public UserRoleDto? GetOrDefault(int id)
@@ -81,13 +80,17 @@ namespace AsbCloudInfrastructure.Repository
             return dto;
         }
 
-        public async Task<IEnumerable<UserRoleDto>?> GetByNamesAsync(IEnumerable<string> names, CancellationToken token)
+        public async Task<IEnumerable<UserRoleDto>> GetByNamesAsync(IEnumerable<string> names, CancellationToken token)
         {
             if (names?.Any() != true)
-                return null;
-            var entities = (await GetCacheUserRoleAsync(token)).Where(r => names.Contains(r.Caption));
+                return Enumerable.Empty<UserRoleDto>();
+
+            var entities = (await GetCacheUserRoleAsync(token))
+                .Where(r => names.Contains(r.Caption));
+
             if (entities?.Count() != names.Count())
                 throw new ArgumentInvalidException("Invalid role names", nameof(names));
+
             var dtos = entities.Select(Convert);
             return dtos;
         }
@@ -104,11 +107,12 @@ namespace AsbCloudInfrastructure.Repository
             return result?.Entity?.Id ?? 0;
         }
 
-        public IEnumerable<UserRoleDto>? GetNestedById(int id, int recursionLevel = 7)
+        public IEnumerable<UserRoleDto> GetNestedById(int id, int recursionLevel = 7)
         {
             var role = GetCacheUserRole().FirstOrDefault(r => r.Id == id);
             if (role is null)
-                return null;
+                return Enumerable.Empty<UserRoleDto>();
+
             var dto = Convert(role);
             var roles = new SortedSet<UserRoleDto>(ComparerIId.GetInstance()) { dto };