The .NET Framework 4.7 is a highly compatible and in-place update to the .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, and 4.6.2. You can see the full set of changes in the .NET Framework 4.7 in the change list and API diff on GitHub.
The matching Developer Pack can be installed using this package.