Add net472 target framework

Author: RehanSaeed

Source/Schema.NET/Schema.NET.csproj

@@ -1,7 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup Label="Build">
-    <TargetFrameworks>netstandard1.1;netstandard2.0;net461</TargetFrameworks>
+    <TargetFrameworks>netstandard1.1;netstandard2.0;net461;net472</TargetFrameworks>
     <NoWarn>$(NoWarn);SA1629</NoWarn>
     <CodeAnalysisRuleSet>../../MinimumRecommendedRulesWithStyleCop.ruleset</CodeAnalysisRuleSet>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -47,7 +47,8 @@
     <PackageReference Include="StyleCop.Analyzers" PrivateAssets="All" Version="1.1.118" />
   </ItemGroup>
 
-  <PropertyGroup Label="Build net641 on Mono" Condition="$(TargetFramework.StartsWith('net4')) and '$(OS)' == 'Unix'">
+  <PropertyGroup Label="Build net4xx on Mono" Condition="$(TargetFramework.StartsWith('net4')) and '$(OS)' == 'Unix'">
+    <!-- See https://www.cafe-encounter.net/p2312/multi-targetting-net-framework-and-net-core-in-a-single-project -->
     <!-- When compiling .NET SDK 2.0 projects targeting .NET 4.x on Mono using 'dotnet build' you -->
     <!-- have to teach MSBuild where the Mono copy of the reference asssemblies is -->
     <!-- Look in the standard install locations -->
@@ -64,6 +65,7 @@
     <FrameworkPathOverride Condition="'$(BaseFrameworkPathOverrideForMono)' != '' AND '$(TargetFramework)' == 'net462'">$(BaseFrameworkPathOverrideForMono)/4.6.2-api</FrameworkPathOverride>
     <FrameworkPathOverride Condition="'$(BaseFrameworkPathOverrideForMono)' != '' AND '$(TargetFramework)' == 'net47'">$(BaseFrameworkPathOverrideForMono)/4.7-api</FrameworkPathOverride>
     <FrameworkPathOverride Condition="'$(BaseFrameworkPathOverrideForMono)' != '' AND '$(TargetFramework)' == 'net471'">$(BaseFrameworkPathOverrideForMono)/4.7.1-api</FrameworkPathOverride>
+    <FrameworkPathOverride Condition="'$(BaseFrameworkPathOverrideForMono)' != '' AND '$(TargetFramework)' == 'net472'">$(BaseFrameworkPathOverrideForMono)/4.7.2-api</FrameworkPathOverride>
     <EnableFrameworkPathOverride Condition="'$(BaseFrameworkPathOverrideForMono)' != ''">true</EnableFrameworkPathOverride>
     <!-- Add the Facades directory.  Not sure how else to do this. Necessary at least for .NET 4.5 -->
     <AssemblySearchPaths Condition="'$(BaseFrameworkPathOverrideForMono)' != ''">$(FrameworkPathOverride)/Facades;$(AssemblySearchPaths)</AssemblySearchPaths>