VisualStudio.TestTools.WebTesting.TestDescriptionAttribute Syntax

Answer 1

TestDescriptionAttribute(TestDescription="hi")

So for that particular test, the description will be hi.

Put it on the top of a method and see whether it works.

Answer 2

As @Ngu has said, put it on the top of a test method

[TestMethod()]
[Description( "PingTest Check" )]
public void PingTest () {
     Ponger target = new Ponger();
     string expected = "Pong";
     string actual;
     actual = target.Ping();
     Assert.AreEqual( expected, actual );
  }

EDIT: TestDescriptionAttribute is from WebTesting namespace, which should not be applied for unit testing. Use the DescriptionAttribute instead, which is part of the UnitTesting namespace.

See the modified code above & I am sure, it will work.

EDIT2: To find something like that, look at the classes in the same namespace. That is how classes are arranged, so that one can find it easily.