Microsoft dotNet Framework 4.5.2

More frames inbound

High-resolution displays" and "better profiling", among the enhancements"

Distributed transactions enhancement that should help in building high-traffic scenarios
New profiling APIs that are less susceptible to unexpected shutdowns
Better activity tracing support that "enables out-of-process, Event Tracing for Windows (ETW)-based activity tracing for a larger surface area," which should be a boon for app performance management vendors
Debugging improvements

New workflow features