Move LangVersion to NHibernate.props

Author: bahusoid

build-common/NHibernate.props

@@ -14,6 +14,7 @@
 
     <NhAppTargetFrameworks Condition ="$(NhAppTargetFrameworks) == ''">net461;netcoreapp2.0</NhAppTargetFrameworks>
     <NhLibTargetFrameworks Condition ="$(NhLibTargetFrameworks) == ''">net461;netcoreapp2.0;netstandard2.0</NhLibTargetFrameworks>
+    <LangVersion>7.3</LangVersion>
 
     <Product>NHibernate</Product>
     <Company>NHibernate.info</Company>

src/NHibernate.DomainModel/NHibernate.DomainModel.csproj

@@ -5,7 +5,6 @@
     <TargetFrameworks>$(NhLibTargetFrameworks)</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <NoWarn>$(NoWarn);3001;3002;3003;3005</NoWarn>
-    <LangVersion>7.2</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <DefineConstants>NETFX;$(DefineConstants)</DefineConstants>

src/NHibernate.Test.VisualBasic/NHibernate.Test.VisualBasic.vbproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="../../build-common/NHibernate.props" />
   <PropertyGroup>
+    <LangVersion/>
     <Description>The Visual Basic Unit Tests for NHibernate.</Description>
     <TargetFrameworks>$(NhAppTargetFrameworks)</TargetFrameworks>
     <IsTestProject>true</IsTestProject>

src/NHibernate.Test/NHibernate.Test.csproj

@@ -6,7 +6,6 @@
     <IsTestProject>true</IsTestProject>
     <NoWarn>$(NoWarn);3001;3002;3003;3005</NoWarn>
     <ContentSQLiteInteropFiles>true</ContentSQLiteInteropFiles>
-    <LangVersion>7.2</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <DefineConstants>NETFX;$(DefineConstants)</DefineConstants>

src/NHibernate.TestDatabaseSetup/NHibernate.TestDatabaseSetup.csproj

@@ -6,7 +6,6 @@
     <TargetFrameworks>$(NhAppTargetFrameworks)</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <NoWarn>$(NoWarn);3001;3002;3003;3005</NoWarn>
-    <LangVersion>7.2</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <DefineConstants>NETFX;$(DefineConstants)</DefineConstants>

src/NHibernate/NHibernate.csproj

@@ -12,7 +12,6 @@
 
     <PackageDescription>NHibernate is a mature, open source object-relational mapper for the .NET framework. It is actively developed, fully featured and used in thousands of successful projects.</PackageDescription>
     <PackageTags>ORM; O/RM; DataBase; DAL; ObjectRelationalMapping; NHibernate; ADO.Net; Core</PackageTags>
-    <LangVersion>7.3</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">