Refactors the DoLoopBlockSyntax kinds to be more useful to consumers. Specifically rather than merely identifying whether the loop has a top condition, bottom condition , or no condition, and requiring in the former two cases the caller to inspect the WhileOrUntilClause to determine how to interpret the condition this kind of the block now reflects this and which of the five forms a Do loop may take in VB. This is consistent with the pattern we use for MethodBlocks which have kinds aligned with the kinds of their method statements which are themselves aligned with the method keyword (i.e. Sub or Function). (changeset 1348593)

this unit test goes through every construct in C# and VB syntax tree and see whether suppression is added as epxected. (changeset 1296974)

An expression-bodied property is a property with an expression instead of accessors, i.e. syntax st. a property P written as

... type P { get { return e; } }

is equivalent to

... type P => e;

This feature is experimental and keyed on the Experimental LanguageVersion. (changeset 1263330)

Migrated state of “Declaration Expressions” implementation equivalent to https://roslyn.codeplex.com/SourceControl/changeset/b7fd08a5695e21cd4d23b8b70815c53656dab65f. (changeset 1249879)