Update Project Framework to NetStandard 2.0-2.1

HowToDoThis · HowToDoThis · commit 9f9536bf3770 · 2021-08-12T01:41:46.000+08:00
diff --git a/src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj b/src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj
@@ -1,7 +1,7 @@
 ﻿<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFrameworks>netstandard2;netstandard2.1</TargetFrameworks>
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>../../assets/ICSharpCode.SharpZipLib.snk</AssemblyOriginatorKeyFile>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
