src/Shared/EntityFramework/Core/Mapping/Update/Internal/Propagator.Evaluator.cs
// <summary>
// Evaluates a null expression (trivial: the result is the null expression)
// </summary>
// <param name="node"> Null expression node. </param>
// <returns> Null expression </returns>
Evaluates a null expression (trivial: the result is the null expression)
Evaluates a null expression ( trivial : the result is the null expression )
public override PropagatorResult Visit(DbNullExpression node)
            {
                Check.NotNull(node, "node");
                var result = PropagatorResult.CreateSimpleValue(PropagatorFlags.Preserve, null);
                return result;
            }
public override PropagatorResult Visit ( DbNullExpression node ) { Check . NotNull ( node , " " ) ; var result = PropagatorResult . CreateSimpleValue ( PropagatorFlags . Preserve , null ) ; return result ; }
Evaluates a null expression (trivial: the result is the null expression)
Evaluates a null expression ( trivial : the result is the null expression )
// Flag the expression as 'preserve', since nulls (by definition) cannot vary
None
node
DbNullExpression
Null expression node.
Null expression node .