Use discard

Author: jnyrup

Tests/FluentAssertions.DataSets.Specs/DataTableSpecs.cs

@@ -246,7 +246,7 @@ public void When_excluding_invalid_constraint_it_should_throw()
 
         // Act
         Action action = () => subject.Should().BeEquivalentTo(expectation, options => options
-            .ExcludingRelated((Constraint constraint) => new object()));
+            .ExcludingRelated((Constraint _) => new object()));
 
         // Assert
         action.Should().Throw<ArgumentException>().WithMessage(