private async Task UpdateP()
{
FirestoreDb db = FirestoreDb.Create(ProjectID);
var policlinics = db.Collection("policlinics");
var query = await policlinics.GetSnapshotAsync();
var p = query.Select(x => x.ConvertTo <Policlinic>())
.Where(x => x.Address == null).ToList().First();
var p2 = await Clinics.GetPoliclinic(p);
var q2 = await policlinics.WhereEqualTo("Name", p2.Name).GetSnapshotAsync();
await q2.First().Reference.SetAsync(new
{
City = p2.City,
Address = p2.Address
}, SetOptions.MergeAll);
MessageBox.Show(p.Name + "\r\n" + p2.City + "\r\n" + p2.Address);
}