Question

I am getting error of invalid arguments when I try to compare two lists using SequenceEqual or Except function in Linq using C# code. My code is as follow,

var one = db.arabia_upod_item_availability_masters.ToList();
var two = db.vw_get_arabia_upod_report_quantityOrderedPerItem_uhjs.ToList();
var result = one.SequenceEqual(two).ToString();

It is same for Except function also. But in both case I get error. Why is it so? What can be the solution?

Thanks in Advance.

Answer 1

SequenceEqual and Enumerable.Except throw ArgumentNullException, Possibly either (or both) of your lists one or two is null.

You may check prior to using SequenceEqual.

if(one != null && two != null)
   {
      var result = one.SequenceEqual(two).ToString();
   }
else
   {
      //null 
   }