Also tidy up character sequences.

Using a different implementation, for clarity.

This function encapsulates a common coding pattern in the scanner
source. That of a `CanGetCharAtOffset( )` followed by multiple multiple
`PeekAheadChar( )` and comparison checks. As a result the scanner source
is a bit better to work with.

Removes unused reference to BasicCodeAnalysis.Desktop.vbproj

removed skipped tests

update unit tests to use localized resources and fix product code that wasn't

update unit tests to use localized resources

Interactive window updates

update Roslyn.Services.Editor.UnitTests.dll to use localized resources

update unit tests to use localized resources

Indent appropriately on Enter inside InterpolatedVerbatimString

Backspace completion should map the caret to the subject buffer

Fixes #74
Closes #799

Ask for bytes of not-yet-loaded winmds

When we try to bind something that is from a not-yet-loaded winmd, we
generally see ErrorCode.ERR_DottedTypeNameNotFoundInNS because the
namespace Windows.X is only provided by Windows.X.winmd.  When this
occurs, heuristically ask the debugger for an assembly with name Windows.X
and content type AssemblyContentType.WindowsRuntime.

The VB equivalent of ERR_DottedTypeNameNotFoundInNS is ERR_NameNotMember2.
However, VB also has a second error code to consider: ERR_UndefinedType1,
which is only produced in type-only contexts.  Since the argument to
ERR_UndefinedType1 is the qualified name, as a string, we have to do some
extra work to determine the next part that needs to be resolved.

Caveat: This doesn't work end-to-end (DevDiv #1130191).

make PreviewDialogWorkspace internal to facilitate other testing

Skip GetMemberValue for Nullable<T> error value

Improve consistency of constant names

Run csc.exe from the MSBuild directory

'this' keyword available in expression-bodied members

Suppress embedded declarations in the EE

Removed file locking when opening resource files.

The expression compiler returns information to the debugger in the form
of .NET assemblies.  These assemblies should not contain embedded
declarations (i.e. "My.*").  At best, these declarations are useless.  At
worst, they hide the declarations in the user's own assembly.

As a bonus, this fixes an issue we were having with being unable to
compile the embedded declarations in cases where two copies of
EditorBrowsableAttribute were loaded (since neither is "closer" or more
accessible while debugging).

Fixes #946.

Assert only an exception type, not its localizable message

The file locking cannot be consistently guaranteed on multiple platform, on remote files, when builds share process via compile server vs. running separately.
Besides we are unable to handle sharing conflicts regardless, so at best the locking was serving only diagnostical purposes.

Handle hoisted Catch local in state machine rewriter

Fixes #863

Expanding out character range.