(Note: Microsoft may redirect to a newer page, but the GUID 42637 is permanent for .NET 4.5.1 and 4.5.2. For pure .NET 4.5, see the historical note below.)
If your project file ( csproj ) shows <TargetFrameworkVersion>v4.5</TargetFrameworkVersion> , installing the usually satisfies the requirement because the reference assemblies are forward-compatible within the 4.5.x family. net framework 45 developer pack link
On that page, look for:
Why developers need it