first compile

.gitignore

@@ -4,3 +4,8 @@
 /PdfSharp/bin
 /AspNetCorePdf/wwwroot
 /PdfSharp/obj
+/MigraDoc.DocumentObjectModel/bin
+/MigraDoc.DocumentObjectModel/obj
+/MigraDoc.Rendering/obj
+/PdfSharp.Charting/obj
+/PdfSharp.Charting/bin

AspNetCorePdf.sln

@@ -12,6 +12,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		readme.md = readme.md
 	EndProjectSection
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PdfSharp.Charting", "PdfSharp.Charting\PdfSharp.Charting.csproj", "{FB88DA7D-269B-4492-8FCF-DD215F911EF3}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MigraDoc.DocumentObjectModel", "MigraDoc.DocumentObjectModel\MigraDoc.DocumentObjectModel.csproj", "{91B2BC3F-91E7-4FB5-9349-DDD1B3BA528E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -26,6 +30,14 @@ Global
 		{DCB309C6-BE42-42EB-B6C0-E765EE75F21C}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DCB309C6-BE42-42EB-B6C0-E765EE75F21C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{DCB309C6-BE42-42EB-B6C0-E765EE75F21C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FB88DA7D-269B-4492-8FCF-DD215F911EF3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FB88DA7D-269B-4492-8FCF-DD215F911EF3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FB88DA7D-269B-4492-8FCF-DD215F911EF3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FB88DA7D-269B-4492-8FCF-DD215F911EF3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{91B2BC3F-91E7-4FB5-9349-DDD1B3BA528E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{91B2BC3F-91E7-4FB5-9349-DDD1B3BA528E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{91B2BC3F-91E7-4FB5-9349-DDD1B3BA528E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{91B2BC3F-91E7-4FB5-9349-DDD1B3BA528E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MigraDoc.DocumentObjectModel/DocumentObjectModel/Unit.cs

@@ -121,7 +121,7 @@ bool INullableValue.IsNull
         /// <summary>
         /// Determines whether this instance is null (not set).
         /// </summary>
-        internal bool IsNull
+        public bool IsNull
         {
             get { return !_initialized; }
         }

MigraDoc.DocumentObjectModel/MigraDoc.DocumentObjectModel.csproj

@@ -20,4 +20,8 @@
     <PackageReference Include="System.Drawing.Common" Version="4.5.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Properties\" />
+  </ItemGroup>
+
 </Project>