[#6741] Remove .Net Core 3.1 from projects

build/onebranch/ci-test-steps.yml

@@ -20,21 +20,12 @@ steps:
     customCommand: 'install -g @microsoft/botframework-cli@next'
 
 - task: UseDotNet@2
-  displayName: "Install .NET Core 3.1.415"
+  displayName: "Install .NET Core 6.0"
   continueOnError: true
   inputs:
     packageType: "sdk"
-    version: 3.1.415
-  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'netcoreapp31'))
-
-- task: DotNetCoreCLI@2
-  displayName: 'dotnet test (release) 3.1'
-  inputs:
-    command: test
-    projects: |
-     Tests/**/*Tests.csproj
-    arguments: '-v n  -f netcoreapp3.1 --configuration release --no-build --no-restore --filter "TestCategory!=IgnoreInAutomatedBuild&TestCategory!=FunctionalTests" --collect:"Code Coverage" --settings $(Build.SourcesDirectory)\CodeCoverage.runsettings'
-  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'netcoreapp31'))
+    version: 6.x
+  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'net6'))
 
 - task: DotNetCoreCLI@2
   displayName: 'dotnet test (release) 6.0'

build/onebranch/pr.yml

@@ -42,14 +42,6 @@ variables:
 stages:
 - stage: Build
   jobs:
-  - job: Debug_Windows_Configuration_31
-    variables:
-      BuildConfiguration: Debug-Windows
-      BuildTarget: 'netcoreapp31' # set the TargetFramework property for tests to use netcoreapp3.1
-    steps:
-    - template: ci-build-steps.yml
-    - template: ci-test-steps.yml
-    - template: ci-component-detection-steps.yml
   - job: Debug_Windows_Configuration_6
     variables:
       BuildConfiguration: Debug-Windows
@@ -66,14 +58,6 @@ stages:
     - template: ci-build-steps.yml
     - template: ci-test-steps.yml
     - template: ci-component-detection-steps.yml
-  - job: Release_Windows_Configuration_31
-    variables:
-      BuildConfiguration: Release-Windows
-      BuildTarget: 'netcoreapp31' # set the TargetFramework property for tests to use netcoreapp3.1
-    steps:
-    - template: ci-build-steps.yml
-    - template: ci-test-steps.yml
-    - template: ci-component-detection-steps.yml
   - job: Release_Windows_Configuration_6
     variables:
       BuildConfiguration: Release-Windows

build/yaml/botbuilder-dotnet-ci.yml

@@ -42,14 +42,6 @@ variables:
 stages:
 - stage: Build
   jobs:
-  - job: Debug_Windows_Configuration_31
-    variables:
-      BuildConfiguration: Debug-Windows
-      BuildTarget: 'netcoreapp31' # set the TargetFramework property for tests to use netcoreapp3.1
-    steps:
-    - template: ci-build-steps.yml
-    - template: ci-test-steps.yml
-    - template: ci-component-detection-steps.yml
   - job: Debug_Windows_Configuration_6
     variables:
       BuildConfiguration: Debug-Windows
@@ -66,14 +58,6 @@ stages:
     - template: ci-build-steps.yml
     - template: ci-test-steps.yml
     - template: ci-component-detection-steps.yml
-  - job: Release_Windows_Configuration_31
-    variables:
-      BuildConfiguration: Release-Windows
-      BuildTarget: 'netcoreapp31' # set the TargetFramework property for tests to use netcoreapp3.1
-    steps:
-    - template: ci-build-steps.yml
-    - template: ci-test-steps.yml
-    - template: ci-component-detection-steps.yml
   - job: Release_Windows_Configuration_6
     variables:
       BuildConfiguration: Release-Windows

build/yaml/ci-test-steps.yml

@@ -20,21 +20,12 @@ steps:
     customCommand: 'install -g @microsoft/botframework-cli@next'
 
 - task: UseDotNet@2
-  displayName: "Install .NET Core 3.1.415"
+  displayName: "Install .NET Core 6.0"
   continueOnError: true
   inputs:
     packageType: "sdk"
-    version: 3.1.415
-  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'netcoreapp31'))
-
-- task: DotNetCoreCLI@2
-  displayName: 'dotnet test (release) 3.1'
-  inputs:
-    command: test
-    projects: |
-     Tests/**/*Tests.csproj
-    arguments: '-v n  -f netcoreapp3.1 --configuration release --no-build --no-restore --filter "TestCategory!=IgnoreInAutomatedBuild&TestCategory!=FunctionalTests" --collect:"Code Coverage" --settings $(Build.SourcesDirectory)\CodeCoverage.runsettings'
-  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'netcoreapp31'))
+    version: 6.x
+  condition: and(succeeded(), eq(variables['BuildConfiguration'],'Release-Windows'), eq(variables['BuildTarget'],'net6'))
 
 - task: DotNetCoreCLI@2
   displayName: 'dotnet test (release) 6.0'

generators/dotnet-templates/Microsoft.BotFramework.CSharp.CoreBot/content/.template.config/template.json

@@ -45,10 +45,6 @@
         "description": "The target framework for the project.",
         "datatype": "choice",
         "choices": [
-          {
-            "choice": "netcoreapp3.1",
-            "description": "Target netcoreapp3.1"
-          },
           {
             "choice": "net6.0",
             "description": "Target net6.0"

generators/dotnet-templates/Microsoft.BotFramework.CSharp.EchoBot/content/.template.config/template.json

@@ -44,10 +44,6 @@
       "description": "The target framework for the project.",
       "datatype": "choice",
       "choices": [
-        {
-          "choice": "netcoreapp3.1",
-          "description": "Target netcoreapp3.1"
-        },
         {
           "choice": "net6.0",
           "description": "Target net6.0"

generators/dotnet-templates/Microsoft.BotFramework.CSharp.EmptyBot/content/.template.config/template.json

@@ -44,10 +44,6 @@
       "description": "The target framework for the project.",
       "datatype": "choice",
       "choices": [
-        {
-          "choice": "netcoreapp3.1",
-          "description": "Target netcoreapp3.1"
-        },
         {
           "choice": "net6.0",
           "description": "Target net6.0"

libraries/Microsoft.Bot.AdaptiveExpressions.Core/Microsoft.Bot.AdaptiveExpressions.Core.csproj

@@ -40,7 +40,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Text.Json" Version="8.0.3" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 
   <ItemGroup>

libraries/Microsoft.Bot.Builder.AI.LUIS/Microsoft.Bot.Builder.AI.Luis.csproj

@@ -31,6 +31,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="3.1.22" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.22" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

libraries/Microsoft.Bot.Builder.AI.QnA/Microsoft.Bot.Builder.AI.QnA.csproj

@@ -30,6 +30,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Bot.Configuration" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Configuration" Condition=" '$(ReleasePackageVersion)' != '' " Version="$(ReleasePackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Builder.Dialogs.Declarative" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />

libraries/Microsoft.Bot.Builder.Azure.Blobs/Microsoft.Bot.Builder.Azure.Blobs.csproj

@@ -21,9 +21,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <!-- Force System.Text.Encodings.Web to a safe version. -->
-    <PackageReference Include="System.Text.Json" Version="4.7.2" />
-    <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1" />
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Azure.Storage.Blobs" Version="12.13.0" />
     <PackageReference Include="Microsoft.Rest.ClientRuntime" Version="2.3.24" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

libraries/Microsoft.Bot.Builder.Azure.Queues/Microsoft.Bot.Builder.Azure.Queues.csproj

@@ -31,6 +31,8 @@
 
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Rest.ClientRuntime" Version="2.3.24" />
     <PackageReference Include="Azure.Storage.Queues" Version="12.11.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

libraries/Microsoft.Bot.Builder.Dialogs.Adaptive.Runtime/Microsoft.Bot.Builder.Dialogs.Adaptive.Runtime.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net6.0;net8.0</TargetFrameworks>
     <PackageId>Microsoft.Bot.Builder.Dialogs.Adaptive.Runtime</PackageId>
     <Description>Library for building Adaptive Runtime bots using the Bot Framework SDK</Description>
     <Summary>Library for building Adaptive Runtime bots using the Bot Framework SDK</Summary>
@@ -22,11 +22,6 @@
     <DebugSymbols>true</DebugSymbols>
   </PropertyGroup>
 
-  <!--It is necessary to separate these conditionals in order to avoid nuget restore errors with netcoreapp3.1.-->
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
-    <FrameworkReference Include="Microsoft.AspNetCore.App" />
-  </ItemGroup>
-
   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
@@ -36,7 +31,6 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Text.Encodings.Web" Version="8.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Hosting.Abstractions" Version="2.1.1" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Formatters.Json" Version="2.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.1.0" />

libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/Microsoft.Bot.Builder.Dialogs.Adaptive.csproj

@@ -39,6 +39,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Bot.Builder.Dialogs.Declarative" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Builder.Dialogs.Declarative" Condition=" '$(ReleasePackageVersion)' != '' " Version="$(ReleasePackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Builder.LanguageGeneration" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />

libraries/Microsoft.Bot.Builder.Dialogs.Declarative/Microsoft.Bot.Builder.Dialogs.Declarative.csproj

@@ -36,6 +36,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force  System.Formats.Asn1 to a safe version. -->
+    <PackageReference Include="System.Formats.Asn1" Version="8.0.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.22" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="NuGet.Packaging" Version="5.11.6" />

libraries/Microsoft.Bot.Connector.Streaming/Microsoft.Bot.Connector.Streaming.csproj

@@ -31,9 +31,6 @@
     <PackageReference Include="Microsoft.Extensions.Logging" Version="2.1.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="System.IO.Pipelines" Version="5.0.1" />
-    <PackageReference Include="System.Text.Json" Version="4.7.2" />
-    <!-- Force System.Text.Encodings.Web to a safe version. -->
-    <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1" />
   </ItemGroup>
 
   <ItemGroup>

libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net6.0;net8.0</TargetFrameworks>
     <PackageId>Microsoft.Bot.Builder.Integration.ApplicationInsights.Core</PackageId>
     <Description>This library integrates the Microsoft Bot Builder SDK with Application Insights.</Description>
     <Summary>This library provides integration between the Microsoft Bot Builder SDK and Application Insights.</Summary>
@@ -20,24 +20,15 @@
     <DebugSymbols>true</DebugSymbols>
   </PropertyGroup>
 
-  <!--It is necessary to separate these conditionals in order to avoid nuget restore errors with netcoreapp3.1.-->
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
     <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.21.0" />    
     <!-- Force Microsoft.AspNetCore.Http to a safe version. -->
     <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.2.0" />
   </ItemGroup>
 
-   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
-    <FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
-    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.21.0" />    
-    <!-- Force Microsoft.AspNetCore.Http to a safe version. -->
-    <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.2.0" />
-  </ItemGroup>
-
-   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
     <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.21.0" />    
@@ -48,14 +39,14 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <!-- Force Microsoft.AspNetCore.Http to a safe version. -->
     <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.2.0" />
-    <!-- Explicitly set dependency to the latest version, because we have a transient dependency brought by Microsoft.ApplicationInsights.AspNetCore and can't fix by updating runtime, since it's not a framework reference"-->
-    <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1" />
     <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
     <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.21.0" />
     <PackageReference Include="System.Net.Security" Version="4.3.1" />
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Bot.Builder" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Builder" Condition=" '$(ReleasePackageVersion)' != '' " Version="$(ReleasePackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Builder.ApplicationInsights" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />

libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/Microsoft.Bot.Builder.Integration.AspNet.Core.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net6.0;net8.0</TargetFrameworks>
     <Description>This library integrates the Microsoft Bot Builder SDK with ASP.NET Core. It offers idiomatic configuration APIs in addition to providing all the plumbing to direct incoming bot messages to a configured bot.</Description>
     <Summary>This library provides integration between the Microsoft Bot Builder SDK and ASP.NET Core.</Summary>
   </PropertyGroup>
@@ -19,22 +19,15 @@
     <DebugSymbols>true</DebugSymbols>
   </PropertyGroup>
 
-  <!--It is necessary to separate these conditionals in order to avoid nuget restore errors with netcoreapp3.1.-->
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
-    <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
-    <FrameworkReference Include="Microsoft.AspNetCore.App" />
-  </ItemGroup>
-
-    <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <!-- Explicitly set to 5.0.1 for those built against 2.0-->
-    <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1" />
     <PackageReference Include="Microsoft.AspNetCore.Hosting.Abstractions" Version="2.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Formatters.Json" Version="2.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.1.0" />
@@ -45,6 +38,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <!-- Force System.Text.Json to a safe version. -->
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Microsoft.Bot.Connector.Streaming" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Connector.Streaming" Condition=" '$(ReleasePackageVersion)' != '' " Version="$(ReleasePackageVersion)" />
     <PackageReference Include="Microsoft.Bot.Streaming" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />

tests/Adapters/Microsoft.Bot.Builder.Adapters.Facebook.Tests/Microsoft.Bot.Builder.Adapters.Facebook.Tests.csproj

@@ -1,10 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework Condition="'$(BuildTarget)' == 'netcoreapp31'">netcoreapp3.1</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net6'">net6.0</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net8'">net8.0</TargetFramework>
-    <TargetFrameworks Condition="'$(BuildTarget)' == ''">netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(BuildTarget)' == ''">net6.0;net8.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
 

tests/Adapters/Microsoft.Bot.Builder.Adapters.Slack.Tests/Microsoft.Bot.Builder.Adapters.Slack.Tests.csproj

@@ -1,10 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework Condition="'$(BuildTarget)' == 'netcoreapp31'">netcoreapp3.1</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net6'">net6.0</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net8'">net8.0</TargetFramework>
-    <TargetFrameworks Condition="'$(BuildTarget)' == ''">netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(BuildTarget)' == ''">net6.0;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

tests/Adapters/Microsoft.Bot.Builder.Adapters.Twilio.Tests/Microsoft.Bot.Builder.Adapters.Twilio.Tests.csproj

@@ -1,10 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework Condition="'$(BuildTarget)' == 'netcoreapp31'">netcoreapp3.1</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net6'">net6.0</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net8'">net8.0</TargetFramework>
-    <TargetFrameworks Condition="'$(BuildTarget)' == ''">netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(BuildTarget)' == ''">net6.0;net8.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
 

tests/Adapters/Microsoft.Bot.Builder.Adapters.Webex.Tests/Microsoft.Bot.Builder.Adapters.Webex.Tests.csproj

@@ -1,10 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework Condition="'$(BuildTarget)' == 'netcoreapp31'">netcoreapp3.1</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net6'">net6.0</TargetFramework>
     <TargetFramework Condition="'$(BuildTarget)' == 'net8'">net8.0</TargetFramework>
-    <TargetFrameworks Condition="'$(BuildTarget)' == ''">netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(BuildTarget)' == ''">net6.0;net8.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
     <!-- The Thrzn41.WebexTeams package isn't signed, so supress the warning. There seems to not be a way to supress this for ONLY Thrzn41.WebexTeams. -->