Champion issue: dotnet/csharplang#4037

PR: #67461

Compiler

• LangVersion
• GetSymbolInfo on instance members invoked on static references
• GetSpeculativeSymbolInfo inside a nameof context with an instance member invoked on a static
• IOperation
• Obsolete is not reported (same as existing behavior)
• Accessibility issues are reported
• All member types checked
  • Methods
  • Properties
  • Fields
  • Events
• Use in const contexts (ie, attribute args)
• Use in non-const contexts (ie, expressions)
• Use in expression trees

IDE

• Members offered in completion