Team explorer default resolve in VS2013

For visual studio 2013 this fixes the issue

[HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\12.0\TeamFoundation\SourceControl\Behavior] "ResolveAsDefaultCheckinAction"="False"

And now available in the settings UI in Visual Studio 2015: https://visualstudio.uservoice.com/forums/330519-team-services/suggestions/3418758-in-the-team-explorer-change-default-state-value-o

Visual Studio 2019

I came here seeking an answer for VS 2019, as apparently the registry 'hack' no longer works.

There is now an setting in Tools -> Options for this, under Source Control -> Visual Studio Team Foundation Server called Resolve associated work items on check-in.

Un-check it to associate by default. Check to resolve by default.