ParallelEnumerable.Sum Method (ParallelQuery<Nullable<Int64>>)
Computes in parallel the sum of a sequence of values.
Assembly: System.Core (in System.Core.dll)
Usage NoteIn Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<Nullable<Int64>>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
The query was canceled with the token passed in through WithCancellation.
source is a null reference (Nothing in Visual Basic).
The sum is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query.