diff --git a/.gitmodules b/.gitmodules
index c69bb85..61f5de8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "DTLib.Ben.Demystifier"]
 	path = DTLib.Ben.Demystifier
 	url = https://github.com/Timerix22/DTLib.Ben.Demystifier.git
+[submodule "DTLib.XXHash"]
+	path = DTLib.XXHash
+	url = https://github.com/Timerix22/DTLib.XXHash.git
diff --git a/DTLib.Ben.Demystifier b/DTLib.Ben.Demystifier
new file mode 160000
index 0000000..cfd755c
--- /dev/null
+++ b/DTLib.Ben.Demystifier
@@ -0,0 +1 @@
+Subproject commit cfd755cd8cde6a087ce9a4e4de8302edf771f76a
diff --git a/DTLib.XXHash b/DTLib.XXHash
new file mode 160000
index 0000000..bec532f
--- /dev/null
+++ b/DTLib.XXHash
@@ -0,0 +1 @@
+Subproject commit bec532f6d9874049930c09c273cbf39473fa6b52
diff --git a/DTLib.sln b/DTLib.sln
index f84486f..f89ba7f 100644
--- a/DTLib.sln
+++ b/DTLib.sln
@@ -30,6 +30,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "KerepWrapper", "KerepWrappe
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DTLib.Logging.Microsoft", "DTLib.Logging.Microsoft\DTLib.Logging.Microsoft.csproj", "{9CCBAFA1-F191-4CEC-A4FA-CFF9F6CA081F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DTLib.XXHash", "DTLib.XXHash\DTLib.XXHash\DTLib.XXHash.csproj", "{C7029741-816D-41B2-A2C4-E20565B1739D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -83,6 +85,12 @@ Global
 		{9CCBAFA1-F191-4CEC-A4FA-CFF9F6CA081F}.Release|Any CPU.Build.0 = Release|Any CPU
 		{9CCBAFA1-F191-4CEC-A4FA-CFF9F6CA081F}.Publish|Any CPU.ActiveCfg = Debug|Any CPU
 		{9CCBAFA1-F191-4CEC-A4FA-CFF9F6CA081F}.Publish|Any CPU.Build.0 = Debug|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Publish|Any CPU.ActiveCfg = Debug|Any CPU
+		{C7029741-816D-41B2-A2C4-E20565B1739D}.Publish|Any CPU.Build.0 = Debug|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/DTLib/Filesystem/File.cs b/DTLib/Filesystem/File.cs
index cb1c97c..80bd961 100644
--- a/DTLib/Filesystem/File.cs
+++ b/DTLib/Filesystem/File.cs
@@ -5,11 +5,7 @@ public static class File
     /// возвращает размер файла в байтах
     public static long GetSize(IOPath file) => new System.IO.FileInfo(file.Str).Length;
 
-    public static bool Exists(IOPath file)
-    {
-        if (System.IO.File.Exists(file.Str)) return true;
-        return false;
-    }
+    public static bool Exists(IOPath file) => System.IO.File.Exists(file.Str);
 
     /// если файл не существует, создаёт файл с папками из его пути и закрывает этот фвйл
     public static void Create(IOPath file)