using Hl7.Fhir.Model; public static class FhirErrorHelper { public static OperationOutcome NotFound(string resourceType, string id) => new() { Issue = { new OperationOutcome.IssueComponent { Severity = OperationOutcome.IssueSeverity.Error, Code = OperationOutcome.IssueType.NotFound, Diagnostics = $"{resourceType}/{id} not found", } } }; }