csharp7.cs

       case IRecursivePattern recursivePattern
         when recursivePattern.TypeUsage == null
           && recursivePattern.DeconstructionPatternClause == null
           && recursivePattern.PropertyPatternClause is IPropertyPatternClause patternPropertyPatternClause
           && patternPropertyPatternClause.PatternsEnumerable.IsEmpty()
           && recursivePattern.Designation == null
           && !recursivePattern.ContainsPreprocessorDirectives():
       {
         
       }

csharp8.cs

       case IRecursivePattern {
              TypeUsage: null,
              DeconstructionPatternClause: null,
              PropertyPatternClause: { Patterns: { Count: 0 } }
              Designation: null
            } recursivePattern
         when !recursivePattern.ContainsPreprocessorDirectives():
       {
         
       }

csharp8b.cs

       case IRecursivePattern(null, null, { Patterns: { Count: 0 } }, null) recursivePattern
         when !recursivePattern.ContainsPreprocessorDirectives():
       {
         
       }