diff --git a/DTLib.Dtsod/DTLib.Dtsod.csproj b/DTLib.Dtsod/DTLib.Dtsod.csproj
index 7164021..239adbe 100644
--- a/DTLib.Dtsod/DTLib.Dtsod.csproj
+++ b/DTLib.Dtsod/DTLib.Dtsod.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net48</TargetFrameworks>
+        <TargetFrameworks>net6.0;net48;netstandard2.0</TargetFrameworks>
         <LangVersion>preview</LangVersion>
         <ImplicitUsings>disable</ImplicitUsings>
         <Nullable>disable</Nullable>
@@ -20,6 +20,10 @@
         <Reference Include="Microsoft.CSharp" />
     </ItemGroup>
 
+    <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
+        <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+    </ItemGroup>
+
     <ItemGroup Condition=" '$(Configuration)' != 'Debug' ">
         <Compile Remove="V30\**" />
     </ItemGroup>
diff --git a/DTLib.Logging/DTLib.Logging.csproj b/DTLib.Logging/DTLib.Logging.csproj
index ff0927c..e7735ff 100644
--- a/DTLib.Logging/DTLib.Logging.csproj
+++ b/DTLib.Logging/DTLib.Logging.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net48</TargetFrameworks>
+        <TargetFrameworks>net6.0;net48;netstandard2.0</TargetFrameworks>
         <LangVersion>10</LangVersion>
         <ImplicitUsings>disable</ImplicitUsings>
         <Nullable>disable</Nullable>
diff --git a/DTLib.Network/DTLib.Network.csproj b/DTLib.Network/DTLib.Network.csproj
index 13a015d..9b888be 100644
--- a/DTLib.Network/DTLib.Network.csproj
+++ b/DTLib.Network/DTLib.Network.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net48</TargetFrameworks>
+        <TargetFrameworks>net6.0;net48;netstandard2.0</TargetFrameworks>
         <LangVersion>preview</LangVersion>
         <ImplicitUsings>disable</ImplicitUsings>
         <Nullable>disable</Nullable>
diff --git a/DTLib.Tests/DTLib.Tests.csproj b/DTLib.Tests/DTLib.Tests.csproj
index 240d82e..5b8c044 100644
--- a/DTLib.Tests/DTLib.Tests.csproj
+++ b/DTLib.Tests/DTLib.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk"> 
 	<PropertyGroup>
 		<OutputType>Exe</OutputType>
-		<TargetFrameworks>net6.0;net48</TargetFrameworks>
+		<TargetFrameworks>net6.0;net48;netstandard2.0</TargetFrameworks>
 		<LangVersion>10</LangVersion>
 		<ImplicitUsings>false</ImplicitUsings>
 		<Nullable>disable</Nullable>
diff --git a/DTLib.Tests/Dtsod/TestPInvoke.cs b/DTLib.Tests/Dtsod/TestPInvoke.cs
index 8c8caa8..7ca57d2 100644
--- a/DTLib.Tests/Dtsod/TestPInvoke.cs
+++ b/DTLib.Tests/Dtsod/TestPInvoke.cs
@@ -28,7 +28,7 @@ public static class TestPInvoke
     }
     
     [DllImport("kerep", CallingConvention = CallingConvention.Cdecl)]
-    static extern void pinvoke_print([MarshalAs(UnmanagedType.LPUTF8Str)] string msg);
+    static extern void pinvoke_print([MarshalAs(UnmanagedType.LPStr)] string msg);
 
     public static void TestPrintf()
     {
@@ -38,7 +38,7 @@ public static class TestPInvoke
     }
     
     [DllImport("kerep", CallingConvention = CallingConvention.Cdecl)]
-    static extern unsafe void test_marshalling([MarshalAs(UnmanagedType.LPUTF8Str)] string text, out IntPtr kptr);
+    static extern unsafe void test_marshalling([MarshalAs(UnmanagedType.LPStr)] string text, out IntPtr kptr);
     
     public static unsafe void TestMarshalling()
     {
diff --git a/DTLib/DTLib.csproj b/DTLib/DTLib.csproj
index 970d5b0..288ef3e 100644
--- a/DTLib/DTLib.csproj
+++ b/DTLib/DTLib.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<TargetFrameworks>net6.0;net48</TargetFrameworks>
+		<TargetFrameworks>net6.0;net48;netstandard2.0</TargetFrameworks>
 		<LangVersion>preview</LangVersion>
 		<ImplicitUsings>disable</ImplicitUsings>
 		<Nullable>disable</Nullable>