The problem is caused by MakeSfxCA.exe accepting and ignoring the misnamed config file. Thanks WiX team support the fix/work-around became possible.
The latest release v1.0.26.0 allows both EmbeddedUI and Custom Actions to be compiled for .NET 4.0. All ManagedSetup samples are also updated to target .NET 4.0.
The latest release v1.0.26.0 allows both EmbeddedUI and Custom Actions to be compiled for .NET 4.0. All ManagedSetup samples are also updated to target .NET 4.0.