Get System.ComponentModel.DescriptionAttribute value of T

EnumHelper.cs

    public static class EnumHelper<T>
    {
        public static string GetEnumDescription(T _enum)
        {
            Type type = _enum.GetType();

            var memInfo = type.GetMember(_enum.ToString());

            if (memInfo.Length > 0)
            {
                var attrs = memInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);

                if (attrs.Length > 0)
                {
                    return ((DescriptionAttribute)attrs[0]).Description;
                }
            }

            throw new ArgumentException("DescriptionAttribute for T is null");
        }
    }

EnumHelperTests.cs

    [TestFixture]
    public class EnumHelperTest : SetupTestFixture
    {
        const string EnumDescription1 = "My First Enum";
        const string EnumDescription2 = "My Second Enum";

        public enum MyEnums
        {
            [System.ComponentModel.Description(EnumDescription1)]
            Enum1 = 1,

            [System.ComponentModel.Description(EnumDescription2)]
            Enum2 = 2
        }

        public enum MyBumEnums
        {
            Enum1 = 1,
            Enum2 = 2
        }

        [Test]
        public void TestDescription()
        {
            var description = EnumHelper<MyEnums>.GetEnumDescription(MyEnums.Enum2);

            var description2 = EnumHelper<MyEnums>.GetEnumDescription(MyEnums.Enum1);

            Assert.AreEqual(description, EnumDescription2);
            Assert.AreEqual(description2, EnumDescription1);

        }

        [Test]
        public void TestDescriptionIsEmpty()
        {
            Assert.Throws<ArgumentException>(() => EnumHelper<MyBumEnums>.GetEnumDescription(MyBumEnums.Enum1));
        }
    }

SetupTestFixture.cs

    [TestFixture]
    public class SetupTestFixture
    {
        private Stopwatch _s;

        [SetUp]
        public void SetUp()
        {
            _s = new Stopwatch();
            _s.Start();
        }

        [TearDown]
        public void Teardown()
        {
            _s.Stop();
            Console.Out.WriteLine("Time for test to complete: " + _s.ElapsedMilliseconds + "ms");
        }
    }