- Disallow field modifiers and field attributes on primary constructor parameters.
- Adjust scope of primary constructor parameters.
- Allow referencing non-ref/non-out primary constructor parameters in a lambda.
- Report appropriate diagnostics when a primary parameter is shadowed in a nested scope.
 (changeset 1261399)

Features the new syntax ('= expr;'), new rules around required accessors, and allows auto property and field initializers in structs. (changeset 1251890)

Improve CS0523 error message for backing fields of primary constructor parameters. This is a port of https://roslyn.codeplex.com/SourceControl/changeset/2e28a89593fe4941209c87215855e5ae08775da2. (changeset 1250498)

Report an error if an argument list is provided for an implemented interface. Fixes https://roslyn.codeplex.com/workitem/4. This is a port of https://roslyn.codeplex.com/SourceControl/changeset/f930b49714dc268a0e9df96d213d5516634a6450. (changeset 1250419)

Migrated state of “Primary Constructors” implementation equivalent to https://roslyn.codeplex.com/SourceControl/changeset/af3db25146a74523fbb2cf11ef00ddec6c0c3690. (changeset 1249690)