diff --git a/AsbCloudInfrastructure/Services/DrillingProgram/Convert/ConvertToPdf.cs b/AsbCloudInfrastructure/Services/DrillingProgram/Convert/ConvertToPdf.cs
index 4c659e41..b2043a10 100644
--- a/AsbCloudInfrastructure/Services/DrillingProgram/Convert/ConvertToPdf.cs
+++ b/AsbCloudInfrastructure/Services/DrillingProgram/Convert/ConvertToPdf.cs
@@ -12,7 +12,7 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram.Convert
 #nullable enable
     sealed internal class ConvertToPdf
     {
-        private static readonly string[] filesExtensions = { ".xlsx", ".xls", ".ods", ".odt", ".doc", ".docx", ".pdf" };
+        internal static readonly string[] filesExtensions = { ".xlsx", ".xls", ".ods", ".odt", ".doc", ".docx", ".pdf" };
 
         private static void MergeFiles(IEnumerable<string> inputFiles, string outFile)
         {
@@ -20,27 +20,27 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram.Convert
             using var doc = new Document();
             using var pdf = new PdfCopy(doc, stream);
             doc.Open();
-            var inputFilesList = inputFiles.ToList();           
-            foreach (var file in inputFilesList)            
-            {                
+            var inputFilesList = inputFiles.ToList();
+            foreach (var file in inputFilesList)
+            {
                 var reader = new PdfReader(file);
                 for (int i = 0; i < reader.NumberOfPages; i++)
                 {
                     pdf.AddPage(pdf.GetImportedPage(reader, i + 1));
                 }
                 pdf.FreeReader(reader);
-                reader.Close();                
+                reader.Close();
             };
         }
 
-        private static async Task StartConvertProcessAsync(string inputFileName, string resultFileDir,CancellationToken token)
-        {           
+        private static async Task StartConvertProcessAsync(string inputFileName, string resultFileDir, CancellationToken token)
+        {
             var command = Cli.Wrap("/usr/bin/soffice")
                 .WithArguments($"--headless --convert-to pdf {inputFileName} --outdir {resultFileDir}");
             await command.ExecuteAsync(token);
         }
-       
-        public static async Task GetConverteAndMergedFileAsync(IEnumerable<string> files, string resultPath, string convertedFilesDir,CancellationToken token)
+
+        public static async Task GetConverteAndMergedFileAsync(IEnumerable<string> files, string resultPath, string convertedFilesDir, CancellationToken token)
         {
             var badFiles = files.Where(f => !filesExtensions.Contains(Path.GetExtension(f)));
             if (badFiles.Any())
@@ -50,22 +50,23 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram.Convert
             }
             var listFiles = files
                 .Distinct()
-                .Select(f => new {
+                .Select(f => new
+                {
                     inputFile = f,
-                    convertedFile = Path.Combine(convertedFilesDir,"pdf",Path.ChangeExtension(Path.GetFileName(f), ".pdf"))                    
+                    convertedFile = Path.Combine(convertedFilesDir, "pdf", Path.ChangeExtension(Path.GetFileName(f), ".pdf"))
                 })
                 .ToList();
             foreach (var file in listFiles)
-            {                                
-                var fileExt = Path.GetExtension(file.inputFile);
+            {
+                var fileExt = Path.GetExtension(file.inputFile).ToLower();
                 if (fileExt != ".pdf")
-                {                 
-                    await StartConvertProcessAsync(file.inputFile, Path.GetDirectoryName(file.convertedFile)!,token);                    
+                {
+                    await StartConvertProcessAsync(file.inputFile, Path.GetDirectoryName(file.convertedFile)!, token);
                 }
             }
             MergeFiles(listFiles.Select(c => c.convertedFile), resultPath);
-            Directory.Delete(Path.Combine(convertedFilesDir,"pdf"),true);
-        }        
+            Directory.Delete(Path.Combine(convertedFilesDir, "pdf"), true);
+        }
     }
 #nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
index 32773c5d..00d2c46e 100644
--- a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
+++ b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
@@ -51,7 +51,7 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
         private const int idStateReady = 3;
         private const int idStateError = 4;
 
-        private static readonly string[] filePermittedExt = { ".xlsx", ".xls", ".ods", ".odt", ".doc", ".docx", ".pdf" };
+        private static readonly string[] validFileExtensions = ConvertToPdf.filesExtensions;
 
         public DrillingProgramService(
             IAsbCloudDbContext context,
@@ -163,18 +163,17 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
             await EnqueueMakeProgramWorkAsync(idWell, state, token);
             return state;
         }
-        private bool ValidExtFile(string file)
+
+        private static bool IsFileExtensionValid(string file)
         {
-            var fileExt = Path.GetExtension(file);
-            var badExt = Array.Find(filePermittedExt, e => e == fileExt);
-            if (badExt is null)            
-                return false;            
-            return true;
+            var fileExt = Path.GetExtension(file).ToLower();
+            return validFileExtensions.Contains(fileExt);
         }
-        public async Task<int> AddFile(int idWell, int idFileCategory, int idUser, string fileFullName, System.IO.Stream fileStream, CancellationToken token = default)
+
+        public async Task<int> AddFile(int idWell, int idFileCategory, int idUser, string fileFullName, Stream fileStream, CancellationToken token = default)
         {
-            if (!ValidExtFile(fileFullName))
-                throw new FileFormatException($"Файл {fileFullName} - неподдерживаемого формата. Файл не может быть загружен. ");
+            if (!IsFileExtensionValid(fileFullName))
+                throw new FileFormatException($"Файл {fileFullName} - неподдерживаемого формата. Файл не может быть загружен.");
 
             var part = await context.DrillingProgramParts
                     .Include(p => p.RelatedUsers)
@@ -346,9 +345,6 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
                     await NotifyPublisherOnFullAccepAsync(fileMarkDto, token);
                 }
             }
-
-
-
             return result;
         }
 
@@ -477,8 +473,6 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
             return part;
         }
 
-        
-
         private async Task EnqueueMakeProgramWorkAsync(int idWell, DrillingProgramStateDto state, CancellationToken token)
         {
             if (state.IdState == idStateCreating)