How do I find a patient by identifier?

[johnkwaters]

I created a patient and assigned it both an Id "777" and an Identifier "ORG-HC-777".

{
  "resourceType": "Patient",
  "id": "ee796f28-da19-11ec-b9aa-f356e801f66c",
  "meta": {
    "versionId": "ee796f28-da19-11ec-b9aa-f356e801f66c",
    "lastUpdated": "2022-05-22T14:55:45.15915-07:00"
  },
  "identifier": [
    {
      "system": "http://ger911.com/fhir/hc",
      "value": "ORG-HC-777"
    }
  ],
  "active": true,
  "name": [
    {
      "family": "KUZIA",
      "given": [
        "STANLEY"
      ]
    }
  ],
  "birthDate": "1963-08-20"
}

It seems the system ignored the Id in my create and assigned some other Id "ee796f28-da19-11ec-b9aa-f356e801f66c".

Since I can't control that, the only way I can find this patient is to search for it by the identifier that I added. How would I do that with a search?

[johnkwaters]

Found something that works:

var b = await fc.SearchAsync<Patient>(new [] { $"identifier={id.System}|{id.Value}" });