Generic Method honors SpacingAfterMethodDeclarationName

Lifted IntPtr Conversions

Formatting leaves comment before case statement undisturbed

The compiler wasn't properly handling the case of a conversion between
Nullable<int> and Nullable<IntPtr>.  The compiler specially handles
IntPtr conversions but wasn't properly lowering them in the
LocalRewriter.

I verified the output IL and expression trees are identical to the
native compiler for these cases.

This closes DevDiv 1210529

Edit testcase to improve understanding

Place taggers in using blocks in tests.

Do not emit AssemblyDef into EnC delta

Make expression trees involving enum literals to look like produced b…

No need to use Visit to create a constant expression.

Native compiler exposes results of constant folding in the expression trees.
In particular, conversion from an enum literal to an underlying type is fairly consistently folded by the native compiler as it can be observed in the expression trees.

Roslyn, on the other hand, was not very consistent here.
Some cases like explicitly converted literals were folded - Ex:  IntTakingMethod((int)E1.a)
Other cases like implicit conversions to underlying type introduced in the processs of type promotion in binary expressions were not.

This fixes known differences in this behavior.

Fixes #4085
Fixes #3292

Fix name of method in Release

Add debug-only diagnostics to TagSource

Remove unnecessary projects from Toolset.sln

added explict check for uninitialized immutable array

Document "breaking change" bug fix to dynamic vs def assignment

A nameof() expression is always legal in an expression tree, as it is a constant

Fixes #4509

Fixes #3923

Don't execute a progression search query on projects without a FilePath.

Target the facade assembly for the CoreClrShim

CI build improvements

Once System.Runtime.Loader is referenced in the project.json files
a facade is correctly copied to the output directory, so
AssemblyLoadContext can be loaded even if the assembly it's located in
changes.

Updating the xplat toolset solution to match the refactored test utility project names.

Remove dependency on particular evaluator implementation

This can happen in Venus projects which create temporary projects for each
contained .aspx file.

Make Interactive window command parsing case sensitive.

Add encoding detection for CoreCLR

```InteractiveWindow``` tacitly assumed that
```IInteractiveEvaluator.ResetAsync``` would a newline-terminated string
to the current language buffer, making it safe to insert a new prompt at
the cursor position.  Obviously, this behavior is implementation-specific
and cannot be relied upon.

Instead, store the uncommitted input and remove the current language
buffer.  If the evaluator adds input, then a new one will be created for
it.  Otherwise, things will be tidy when the window creates a new prompt
and restores the uncommitted input.

Fixes #4518