Build system: get stuff to build (and run tests)

Mostly updates to target newer framework, and to use newer versions of
(deprecated) libraries.
- update test to target net8.0 and net472
- leave libraries at older frameworks (because they are 'forward'
  compatible)
- use newer libraries
  - NUnint
  - Microsoft.SourceLink.GitHub
- Directory.Build.props file to sync nuget package versions for
  dotnetdbf and dotnetdbf.enumerable
- Directory.Build.target file to specify directory to which to publish
  nuget packages

.gitignore

@@ -1,9 +1,10 @@
 bin
 obj
 /packages
+/publish
 
 *.suo
 
 *.user
 .idea/*
-.vs/*
+.vs/*

Directory.Build.props

@@ -0,0 +1,5 @@
+<Project>
+  <PropertyGroup>
+    <VersionPrefix>7.0.1</VersionPrefix>
+  </PropertyGroup>
+</Project>

Directory.Build.targets

@@ -0,0 +1,8 @@
+<Project>
+  <Target Name="CopyPackage" AfterTargets="Pack">
+    <Copy
+      SourceFiles="$(OutputPath)$(PackageId).$(PackageVersion).nupkg"
+      DestinationFolder="$(SolutionDir)\publish"
+    />
+  </Target>
+</Project>

DotNetDBF.Enumerable/DotNetDBF.Enumerable.csproj

@@ -18,15 +18,14 @@
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
-    <Version>6.0.0.2</Version>
     <IncludeSymbols>True</IncludeSymbols>
     <IncludeSource>True</IncludeSource>
   </PropertyGroup>
   <ItemGroup>
     <None Include="..\Copying.txt" Pack="true" PackagePath="" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05" PrivateAssets="All"/>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All"/>
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ImpromptuInterface" Version="7.0.1" />
@@ -35,4 +34,4 @@
     <ProjectReference Include="..\DotNetDBF\DotNetDBF.csproj" />
   </ItemGroup>
 
-</Project>
+</Project>

DotNetDBF.Test/DotNetDBF.Test.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net462</TargetFrameworks>
-    <OutputType Condition="'$(TargetFramework)'!='netcoreapp2.0'">Exe</OutputType>
+    <TargetFrameworks>net8.0;net472</TargetFrameworks>
+    <OutputType Condition="'$(TargetFramework)'=='net472'">Exe</OutputType>
     <Copyright>Copyright ©  2017</Copyright>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="3.7.1" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.8.*" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.*" />
   </ItemGroup>
@@ -40,4 +40,4 @@
     <EmbeddedResource Include="dbfs\dbase_8b_summary.txt" />
     <EmbeddedResource Include="dbfs\dbase_f5_summary.txt" />
   </ItemGroup>
-</Project>
+</Project>

DotNetDBF.Test/Program.cs

@@ -4,7 +4,7 @@
 
 namespace DotNetDBF.Test
 {
-#if !NETCOREAPP2_0
+#if NET472
     public class Program
     {
         public static void Main()

DotNetDBF/DotNetDBF.csproj

@@ -3,7 +3,6 @@
     <TargetFrameworks>net35;netstandard2.0</TargetFrameworks>
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>sn.snk</AssemblyOriginatorKeyFile>
-    <Version>7.0.0.0</Version>
     <Company>Ekon Benefits</Company>
     <Copyright>Copyright 2009-2017</Copyright>
     <Description>This is a basic file parser for reading and writing xBase DBF files particularlly Clipper. Code originally derived from javadbf.</Description>
@@ -24,7 +23,7 @@
     <None Include="..\Copying.txt" Pack="true" PackagePath=""/>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05" PrivateAssets="All"/>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All"/>
   </ItemGroup>
 
   <ItemGroup>