I have this CSOM code:-

Microsoft.SharePoint.Client.Group group = context.Site.RootWeb.SiteGroups.GetByName(webname);                 
int count = group.Users.Count();
FieldUserValue[] values = new FieldUserValue[group.Users.Count()];
      for (int i = 0; i < count; i++)
            FieldUserValue fuv = new FieldUserValue();
            fuv.LookupId = group.Users[i].Id;//THIS WILL WORK FINE
            values[i] = fuv;
User user = context.Web.CurrentUser;
if (group.Users.Any(a => a.Id == user.Id) && (currentItem["Team"] == null || currentItem["Team"].ToString().ToLower() != "cm"))//THIS WILL RAISE AN ERROR

now i am able to get the group.Users[i].Id without any issue, which on this code group.Users.Any(a => a.Id == user.Id) i got this exception :-

  Message=The property or field 'Id' has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.
  Source=<Cannot evaluate the exception source>
<Cannot evaluate the exception stack trace>

so why i can get the group.Users[i].Id without loading anything while i can not do the same for group.Users.Any(a => a.Id == user.Id)?? Thanks

1 Answer 1


First, you have already loaded group.users in below code:


It has requested data from server and the related object has been initialized. So it's able to access group.Users[i].Id

The variable user in below code is another object.

User user = context.Web.CurrentUser;

It has not been initialized (ctx runtime has not send such a request). So we cannot access its ID.

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