See #35071

Roslyn.Compilers.CompilerServer.UnitTests removed in 24721202
Roslyn.Test.Utilities.CoreClr removed in cf58bbcb
Roslyn.Test.Utilities.Desktop removed in cf58bbcb
Roslyn.Compilers.CSharp.PerformanceTests removed in cd333330
Roslyn.Test.Utilities.FX45 removed in b77c5473
Roslyn.Compilers.VisualBasic.PerformanceTests never existed (typo from 3c14b040)
Roslyn.Compilers.CSharp.Test.Utilities.Desktop removed in edd89e4e

See #35069

Closes #35064

Revoke IVTs to dotnet/roslyn-analyzers

Closes #35102

Implement `where T: class` and `where T: struct` for overrides and explicit interface implementations.

Closes #34798.
Closes #29847.

Merge dev16.1-preview2 to master

Disable background download UI to avoid toasts

Fix all remaining violations of RS1016

Apply hang mitigating timeouts in integration tests

Improve IDE0052 diagnostic message for properties with used setter bu…

* Stop processes that block VSIX installation.

Rather than requiring no devenv processes to be running when installing the VSIX, detect what processes might block the installation (those whose module is under the target VS install and extension dirs) and kill them if the user confirms.

Add IVTs to 16.1 version of RemoteLS

Fix assert in remove unused member analyzer

Implement `where T: class` and `where T: struct` for overrides and explicit interface implementations.

Closes #34798.
Closes #29847.

Implement import completion for types

Change preview warnings from a background to a border marker

If available, use the host service to provide IVsRefactorNotify changes of the symbols being changed so dependent frameworks
can handle the changes appropriately.

Adds unit tests that verify we have the correct code operations produced when we expect symbols to change.

When I implemented the Index and Range pattern support I forgot to
update the ref and ref-like checking behavior, which caused the
expressions to have the wrong behavior for certain operations and
potentially crash the compiler.

This change adds tests for ref returns and ref-like lifetimes and
implements the appropriate behavior.

Use original definition symbol for fetching control flow graph of gen…

Fixes #33765

Treat unconstrained type parameters declared in `#nullable disable` context as having an oblivious nullability in case they are substituted with a reference type. (#34797)

As apposed to possibly nullable or not nullable reference type.
Fixes #29980.
Fixes #34844.

Implement `where T: class` and `where T: struct` for overrides and implementations

Correctly report mismatches in foreach types