C# - The Query Results Enumerated More Than Once?

Mar 17, 2011

datacontextclass dc=new datacontextclass ();
var news= dc.GetNewsCompany(Int64.Parse ( _idCompany));
if (news.GetEnumerator().MoveNext())
foreach (var item in news)

return error:{"The query results cannot be enumerated more than once."}

how can check result != null in LINQ;

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