diff --git a/common/ASC.Common/Logging/SelfCleaningAppender.cs b/common/ASC.Common/Logging/SelfCleaningAppender.cs
index 5eca630b79..a790bacf4d 100644
--- a/common/ASC.Common/Logging/SelfCleaningAppender.cs
+++ b/common/ASC.Common/Logging/SelfCleaningAppender.cs
@@ -27,14 +27,14 @@ namespace ASC.Common.Logging;
 
 public class SelfCleaningAppender : RollingFileAppender
 {
-    private static DateTime s_lastCleanDate;
-    private static int? s_cleanPeriod;
+    private static DateTime _lastCleanDate;
+    private static int? _cleanPeriod;
 
     protected override void Append(LoggingEvent loggingEvent)
     {
-        if (DateTime.UtcNow.Date > s_lastCleanDate.Date)
+        if (DateTime.UtcNow.Date > _lastCleanDate.Date)
         {
-            s_lastCleanDate = DateTime.UtcNow.Date;
+            _lastCleanDate = DateTime.UtcNow.Date;
             Clean();
         }
 
@@ -43,9 +43,9 @@ public class SelfCleaningAppender : RollingFileAppender
 
     protected override void Append(LoggingEvent[] loggingEvents)
     {
-        if (DateTime.UtcNow.Date > s_lastCleanDate.Date)
+        if (DateTime.UtcNow.Date > _lastCleanDate.Date)
         {
-            s_lastCleanDate = DateTime.UtcNow.Date;
+            _lastCleanDate = DateTime.UtcNow.Date;
             Clean();
         }
 
@@ -54,9 +54,9 @@ public class SelfCleaningAppender : RollingFileAppender
 
     private static int GetCleanPeriod()
     {
-        if (s_cleanPeriod != null)
+        if (_cleanPeriod != null)
         {
-            return s_cleanPeriod.Value;
+            return _cleanPeriod.Value;
         }
 
         const string key = "CleanPeriod";
@@ -69,7 +69,7 @@ public class SelfCleaningAppender : RollingFileAppender
             int.TryParse(repo.Properties[key].ToString(), out value);
         }
 
-        s_cleanPeriod = value;
+        _cleanPeriod = value;
 
         return value;
     }
diff --git a/common/ASC.Common/Logging/SelfCleaningTarget.cs b/common/ASC.Common/Logging/SelfCleaningTarget.cs
index 6be0839189..4a97e0c3d1 100644
--- a/common/ASC.Common/Logging/SelfCleaningTarget.cs
+++ b/common/ASC.Common/Logging/SelfCleaningTarget.cs
@@ -30,14 +30,14 @@ namespace ASC.Common.Logging;
 [Target("SelfCleaning")]
 public class SelfCleaningTarget : FileTarget
 {
-    private static DateTime s_lastCleanDate;
-    private static int? s_cleanPeriod;
+    private static DateTime _lastCleanDate;
+    private static int? _cleanPeriod;
 
     protected override void Write(IList<AsyncLogEventInfo> logEvents)
     {
-        if (DateTime.UtcNow.Date > s_lastCleanDate.Date)
+        if (DateTime.UtcNow.Date > _lastCleanDate.Date)
         {
-            s_lastCleanDate = DateTime.UtcNow.Date;
+            _lastCleanDate = DateTime.UtcNow.Date;
             Clean();
         }
 
@@ -60,9 +60,9 @@ public class SelfCleaningTarget : FileTarget
 
     protected override void Write(LogEventInfo logEvent)
     {
-        if (DateTime.UtcNow.Date > s_lastCleanDate.Date)
+        if (DateTime.UtcNow.Date > _lastCleanDate.Date)
         {
-            s_lastCleanDate = DateTime.UtcNow.Date;
+            _lastCleanDate = DateTime.UtcNow.Date;
             Clean();
         }
 
@@ -71,9 +71,9 @@ public class SelfCleaningTarget : FileTarget
 
     private static int GetCleanPeriod()
     {
-        if (s_cleanPeriod != null)
+        if (_cleanPeriod != null)
         {
-            return s_cleanPeriod.Value;
+            return _cleanPeriod.Value;
         }
 
         var value = 30;
@@ -90,7 +90,7 @@ public class SelfCleaningTarget : FileTarget
             }
         }
 
-        s_cleanPeriod = value;
+        _cleanPeriod = value;
 
         return value;
     }
diff --git a/common/ASC.Common/Security/Authorizing/AzObjectIdHelper.cs b/common/ASC.Common/Security/Authorizing/AzObjectIdHelper.cs
index 69dd7dc877..5cd96a1c1c 100644
--- a/common/ASC.Common/Security/Authorizing/AzObjectIdHelper.cs
+++ b/common/ASC.Common/Security/Authorizing/AzObjectIdHelper.cs
@@ -28,7 +28,7 @@ namespace ASC.Common.Security.Authorizing;
 
 public static class AzObjectIdHelper
 {
-    private static readonly string s_separator = "|";
+    private static readonly string _separator = "|";
 
     public static string GetFullObjectId(ISecurityObjectId objectId)
     {
@@ -37,6 +37,6 @@ public static class AzObjectIdHelper
             return null;
         }
 
-        return $"{objectId.ObjectType.FullName}{s_separator}{objectId.SecurityId}";
+        return $"{objectId.ObjectType.FullName}{_separator}{objectId.SecurityId}";
     }
 }
diff --git a/common/ASC.Common/Utils/CrossPlatformUtils.cs b/common/ASC.Common/Utils/CrossPlatformUtils.cs
index b4bfe15b68..b26ac4ddfc 100644
--- a/common/ASC.Common/Utils/CrossPlatformUtils.cs
+++ b/common/ASC.Common/Utils/CrossPlatformUtils.cs
@@ -27,11 +27,11 @@ namespace ASC.Common.Utils;
 
 public static class CrossPlatform
 {
-    private static char[] s_pathSplitCharacters = new char[] { '/', '\\' };
+    private static char[] _pathSplitCharacters = new char[] { '/', '\\' };
 
     public static string PathCombine(string basePath, params string[] additional)
     {
-        var splits = additional.Select(s => s.Split(s_pathSplitCharacters)).ToArray();
+        var splits = additional.Select(s => s.Split(_pathSplitCharacters)).ToArray();
         var totalLength = splits.Sum(arr => arr.Length);
         var segments = new string[totalLength + 1];
         segments[0] = basePath;
diff --git a/common/ASC.Common/Utils/HtmlUtil.cs b/common/ASC.Common/Utils/HtmlUtil.cs
index 80763c5a5c..b82050af93 100644
--- a/common/ASC.Common/Utils/HtmlUtil.cs
+++ b/common/ASC.Common/Utils/HtmlUtil.cs
@@ -27,17 +27,17 @@ namespace ASC.Common.Utils;
 
 public static class HtmlUtil
 {
-    private static readonly Regex s_tagReplacer
+    private static readonly Regex _tagReplacer
         = new Regex("<[^>]*>", RegexOptions.Multiline | RegexOptions.Compiled);
 
-    private static readonly Regex s_commentsReplacer
+    private static readonly Regex _commentsReplacer
         = new Regex("<!--(?s).*?-->", RegexOptions.Singleline | RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-    private static readonly Regex s_xssReplacer
+    private static readonly Regex _xssReplacer
         = new Regex(@"<\s*(style|script)[^>]*>(.*?)<\s*/\s*(style|script)>", RegexOptions.IgnoreCase
             | RegexOptions.CultureInvariant | RegexOptions.Compiled | RegexOptions.Singleline);
 
-    private static readonly Regex s_worder =
+    private static readonly Regex _worder =
         new Regex(@"\S+", RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
 
     public static string GetText(string html, int maxLength = 0, string endBlockTemplate = "...")
@@ -46,19 +46,19 @@ public static class HtmlUtil
 
         if (!string.IsNullOrEmpty(html))
         {
-            html = s_xssReplacer.Replace(html, string.Empty); //Clean malicious tags. <script> <style>
+            html = _xssReplacer.Replace(html, string.Empty); //Clean malicious tags. <script> <style>
 
             if (string.IsNullOrEmpty(html))
             {
                 return html;
             }
 
-            unformatedText = s_tagReplacer.Replace(html, string.Empty);
+            unformatedText = _tagReplacer.Replace(html, string.Empty);
 
             if (!string.IsNullOrEmpty(unformatedText))
             {
                 // kill comments
-                unformatedText = s_commentsReplacer.Replace(unformatedText, string.Empty);
+                unformatedText = _commentsReplacer.Replace(unformatedText, string.Empty);
                 unformatedText = unformatedText.Trim();
 
                 if (!string.IsNullOrEmpty(unformatedText))
@@ -109,7 +109,7 @@ public static class HtmlUtil
             return htmlText;
         }
 
-        var regexpstr = s_worder.Matches(searchText).Cast<Match>().Select(m => m.Value).Distinct().Aggregate((r, n) => r + "|" + n);
+        var regexpstr = _worder.Matches(searchText).Cast<Match>().Select(m => m.Value).Distinct().Aggregate((r, n) => r + "|" + n);
         var wordsFinder = new Regex(Regex.Escape(regexpstr), RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.Multiline);
 
         return wordsFinder.Replace(htmlText, m => string.Format("<span class='searchTextHighlight{1}'>{0}</span>", m.Value, withoutLink ? " bold" : string.Empty));
diff --git a/common/ASC.Common/Web/MimeMapping.cs b/common/ASC.Common/Web/MimeMapping.cs
index a6af276230..7ebd83b1f7 100644
--- a/common/ASC.Common/Web/MimeMapping.cs
+++ b/common/ASC.Common/Web/MimeMapping.cs
@@ -27,8 +27,8 @@ namespace ASC.Common.Web;
 
 public static class MimeMapping
 {
-    private static readonly Hashtable s_extensionToMimeMappingTable = new Hashtable(200, StringComparer.CurrentCultureIgnoreCase);
-    private static readonly IDictionary<string, IList<string>> s_mimeSynonyms = new Dictionary<string, IList<string>>();
+    private static readonly Hashtable _extensionToMimeMappingTable = new Hashtable(200, StringComparer.CurrentCultureIgnoreCase);
+    private static readonly IDictionary<string, IList<string>> _mimeSynonyms = new Dictionary<string, IList<string>>();
 
     static MimeMapping()
     {
@@ -810,12 +810,12 @@ public static class MimeMapping
     {
         if (string.IsNullOrEmpty(mimeMapping)) return null;
 
-        foreach (DictionaryEntry entry in s_extensionToMimeMappingTable)
+        foreach (DictionaryEntry entry in _extensionToMimeMappingTable)
         {
             var mime = (string)entry.Value;
             if (mime == mimeMapping.ToLowerInvariant()) return (string)entry.Key;
-            if (!s_mimeSynonyms.ContainsKey(mime)) continue;
-            if (s_mimeSynonyms[mime].Contains(mimeMapping.ToLowerInvariant())) return (string)entry.Key;
+            if (!_mimeSynonyms.ContainsKey(mime)) continue;
+            if (_mimeSynonyms[mime].Contains(mimeMapping.ToLowerInvariant())) return (string)entry.Key;
         }
 
         return null;
@@ -827,27 +827,27 @@ public static class MimeMapping
         var startIndex = fileName.LastIndexOf('.');
 
         if (0 <= startIndex && fileName.LastIndexOf('\\') < startIndex)
-            str = (string)s_extensionToMimeMappingTable[fileName.Substring(startIndex)];
+            str = (string)_extensionToMimeMappingTable[fileName.Substring(startIndex)];
 
-        if (str == null) str = (string)s_extensionToMimeMappingTable[".*"];
+        if (str == null) str = (string)_extensionToMimeMappingTable[".*"];
 
         return str;
     }
 
     private static void AddMimeMapping(string extension, string MimeType)
     {
-        if (s_extensionToMimeMappingTable.ContainsKey(extension))
-            AddMimeSynonym((string)s_extensionToMimeMappingTable[extension], MimeType);
+        if (_extensionToMimeMappingTable.ContainsKey(extension))
+            AddMimeSynonym((string)_extensionToMimeMappingTable[extension], MimeType);
 
-        else s_extensionToMimeMappingTable.Add(extension, MimeType);
+        else _extensionToMimeMappingTable.Add(extension, MimeType);
     }
 
     private static void AddMimeSynonym(string mime, string synonym)
     {
-        if (!s_mimeSynonyms.ContainsKey(mime))
-            s_mimeSynonyms[mime] = new List<string>();
+        if (!_mimeSynonyms.ContainsKey(mime))
+            _mimeSynonyms[mime] = new List<string>();
 
-        if (!s_mimeSynonyms[mime].Contains(synonym))
-            s_mimeSynonyms[mime].Add(synonym);
+        if (!_mimeSynonyms[mime].Contains(synonym))
+            _mimeSynonyms[mime].Add(synonym);
     }
 }