What does System.Reflection.Missing.Value do?

c# system.reflection
Murtaza Munshi picture Murtaza Munshi · Sep 1, 2013 · Viewed 11.6k times · Source

I encountered a code given below 

Object oMissing = System.Reflection.Missing.Value
oDataDoc = wrdApp.Documents.Open(ref oName, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing);

I dont understand what will ref oMissing do. Will it automatically get the values or something like that?

Answer

Prash picture Prash · Sep 1, 2013

It represents null value. Note that null is not equal to Missing.Value

Just to add more information, as you can see in the screen shot below, Missing.Value is NOT equal to null, and in fact is a new instance of Missing class object

enter image description here

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