Problem Statement
How can two different item groups be joined based on metadata
Solutions
1.
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Target Name="Default">
<ItemGroup>
<!– Group1 Items –>
<Group1 Include="Red">
<IsFavorite>false</IsFavorite>
</Group1>
<Group1 Include="Yellow">
<IsFavorite>true</IsFavorite>
</Group1>
<Group1 Include="Green">
<IsFavorite>true</IsFavorite>
</Group1>
<!– Group2 Items –>
<Group2 Include="Blue">
<IsFavorite>true</IsFavorite>
</Group2>
<Group2 Include="Grey">
<IsFavorite>false</IsFavorite>
</Group2>
<Group2 Include="Silver">
<IsFavorite>true</IsFavorite>
</Group2>
<!– Combine the groups where IsFavorite is true –>
<Group3 Include="@(Group1);@(Group2)" Condition="’%(IsFavorite)’ == ‘true’"/>
</ItemGroup>
<!– Display the results –>
<Message Text="Group 1 – %(Group1.Identity)"/>
<Message Text="Group 2 – %(Group2.Identity)"/>
<Message Text="Group 3 – %(Group3.Identity)"/>
</Target>
</Project>
