Merge remote-tracking branch 'origin/main'

# Conflicts:
#	RevitExtensions.sln

Author: Nice3point

source/Nice3point.Revit.Extensions/Nice3point.Revit.Extensions.csproj

@@ -8,8 +8,8 @@
         <ImplicitUsings>true</ImplicitUsings>
         <AppendTargetFrameworkToOutputPath>true</AppendTargetFrameworkToOutputPath>
         <DefineConstants>$(DefineConstants);JETBRAINS_ANNOTATIONS</DefineConstants>
-        <Configurations>Debug R20;Debug R21;Debug R22;Debug R23;Debug R24;Debug R25;Debug R26</Configurations>
-        <Configurations>$(Configurations);Release R20;Release R21;Release R22;Release R23;Release R24;Release R25;Release R26</Configurations>
+        <Configurations>Debug R19;Debug R20;Debug R21;Debug R22;Debug R23;Debug R24;Debug R25;Debug R26</Configurations>
+        <Configurations>$(Configurations);Release R19;Release R20;Release R21;Release R22;Release R23;Release R24;Release R25;Release R26</Configurations>
     </PropertyGroup>
 
     <PropertyGroup>
@@ -32,7 +32,10 @@
         <SymbolPackageFormat>snupkg</SymbolPackageFormat>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
     </PropertyGroup>
-
+	<PropertyGroup Condition="$(Configuration.Contains('R19'))">
+		<RevitVersion>2019</RevitVersion>
+		<TargetFramework>net47</TargetFramework>
+	</PropertyGroup>
     <PropertyGroup Condition="$(Configuration.Contains('R20'))">
         <RevitVersion>2020</RevitVersion>
         <TargetFramework>net47</TargetFramework>