<Using>
nodes should be ordered alphabetically within a single <ItemGroup>
in order to make it more human readable. When ordering the references based on
other criteria, consider grouping them in seperate <ItemGroup>
s.
<Project Sdk="Microsoft.NET.Sdk">
<ItemGroup>
<Using Include="NamespaceB" />
<Using Include="NamespaceA" />
</ItemGroup>
</Project>
<Project Sdk="Microsoft.NET.Sdk">
<ItemGroup>
<Using Include="NamespaceA" />
<Using Include="NamespaceB" />
</ItemGroup>
</Project>