Update target framework from net7 to net8.

Author: Konard

.github/workflows/csharp.yml

@@ -24,7 +24,7 @@ jobs:
           submodules: true
       - name: Test
         run: |
-          dotnet test -c Release -f net7
+          dotnet test -c Release -f net8
   pushNuGetPackageToGitHubPackageRegistry:
     needs: test
     runs-on: ubuntu-latest

csharp/Platform.Diagnostics.Tests/Platform.Diagnostics.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7</TargetFramework>
+    <TargetFramework>net8</TargetFramework>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>

csharp/Platform.Diagnostics/Platform.Diagnostics.csproj

@@ -6,7 +6,7 @@
     <AssemblyTitle>Platform.Diagnostics</AssemblyTitle>
     <VersionPrefix>0.1.0</VersionPrefix>
     <Authors>Konstantin Diachenko</Authors>
-    <TargetFramework>net7</TargetFramework>
+    <TargetFramework>net8</TargetFramework>
     <AssemblyName>Platform.Diagnostics</AssemblyName>
     <PackageId>Platform.Diagnostics</PackageId>
     <PackageTags>LinksPlatform;Diagnostics;Performance</PackageTags>