User or group column is populated with incorrect values when adding data from CSOM

Question

Hi All,
I am working on a console application that updates list items using managed CSOM. I have a user or group column in this list that can contain multiple values. Now, I am using below code to update the value of this column:
User newUser = web.EnsureUser("LoginName");
context.Load(newUser);
context.ExecuteQuery();
FieldUserValue userValue = new FieldUserValue();
userValue.LookupId = newUser.Id;
listItem["User"] = userValue;
The issue is if i assign the value of user1 to this column, the value that I see after the column is updated is another user; like user2. I don't know why it is populating this code with some other user? 
Any idea on this issue? Thanks in advance.

Answer 1

try these links:
http://blogs.msdn.com/b/kaevans/archive/2013/11/30/setting-a-sharepoint-person-or-group-field-value-with-csom.aspx
http://stackoverflow.com/questions/637859/sharepoint-group-by-is-broken-when-using-allow-multiple-values-for-a-column
http://stackoverflow.com/questions/26815640/caml-person-or-group-field-with-multiple-values
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