backward compatibility increased by setting core project to netstandard2.0
diff --git a/sdks/dotnet/basyx-components/BaSyx.Submodel.Client.Http/BaSyx.Submodel.Client.Http.csproj b/sdks/dotnet/basyx-components/BaSyx.Submodel.Client.Http/BaSyx.Submodel.Client.Http.csproj
index 5ba8183..7096d25 100644
--- a/sdks/dotnet/basyx-components/BaSyx.Submodel.Client.Http/BaSyx.Submodel.Client.Http.csproj
+++ b/sdks/dotnet/basyx-components/BaSyx.Submodel.Client.Http/BaSyx.Submodel.Client.Http.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <Authors>Constantin Ziesche</Authors>
     <Copyright>Copyright 2020 - Robert Bosch GmbH</Copyright>
     <PackageProjectUrl>https://wiki.eclipse.org/BaSyx</PackageProjectUrl>