Initial commit

code/test/AttendeeTest/AttendeeExists.cs

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+using System;
+using Xunit;
+using Xunit.Extensions;
+using Attendees;
+
+namespace AttendeeTest
+{
+    public class AttendeeTest
+    {
+        [Fact]
+        public void AttendeeExistsReturnTrue()
+        {
+            Attendee attendee = new Attendee();
+            bool doesExist = attendee.AddAttendee("doesnotexist");
+            Assert.False(doesExist, "The attendee does not exist");
+        }
+    }
+}