Avoid all custom tasks, since this causes build issues in Visual Studio (Build.Tasks.dll gets loaded into the main AppDomain and remains locked, meaning you have to exit Visual Studio before rebuilding the project).

Documentation/Build.Docs.csproj

@@ -16,8 +16,8 @@
     <CodeAnalysisIgnoreBuiltInRules>false</CodeAnalysisIgnoreBuiltInRules>
     <CodeAnalysisFailOnMissingRules>false</CodeAnalysisFailOnMissingRules>
   </PropertyGroup>
-  <Import Project="..\Source\Build.Tasks\Common.xml" />
   <PropertyGroup>
+    <OutputPath>.\Source</OutputPath>
     <LatexPath>$(OutputPath)\latex</LatexPath>
     <HtmlPath>$(OutputPath)\html</HtmlPath>
     <ProjectGuid>{650C6F3D-33B5-4216-9536-956AB42C0624}</ProjectGuid>
@@ -36,10 +36,10 @@
     <None Include="Todo.txt" />
   </ItemGroup>
   <Target Name="Build">
-    <Run Command="doxygen" />
-    <Run Command="pdflatex -interaction=batchmode refman.tex" WorkingDirectory="$(LatexPath)" />
-    <Run Command="makeindex -q refman.idx" WorkingDirectory="$(LatexPath)" />
-    <Run Command="pdflatex -interaction=batchmode refman.tex" WorkingDirectory="$(LatexPath)" />
+    <Exec Command="doxygen" />
+    <Exec Command="pdflatex -interaction=batchmode refman.tex" WorkingDirectory="$(LatexPath)" />
+    <Exec Command="makeindex -q refman.idx" WorkingDirectory="$(LatexPath)" />
+    <Exec Command="pdflatex -interaction=batchmode refman.tex" WorkingDirectory="$(LatexPath)" />
     <Copy SourceFiles="$(LatexPath)\refman.pdf" DestinationFiles="Reference.pdf" />
   </Target>
   <Target Name="Clean">
@@ -52,4 +52,4 @@
     <CallTarget Targets="Clean" />
     <CallTarget Targets="Build" />
   </Target>
-</Project>
+</Project>