상속: IEnvironmentVariableWrapper
 public void Get()
 {
     var subject = new EnvironmentVariableWrapper();
     Assert.That(subject.Get("TEMP"), Is.Not.Null);
 }
        public void Get()
        {
            var subject = new EnvironmentVariableWrapper();

            Assert.That(subject.Get("TEMP"), Is.Not.Null);
        }