public void BothEnvironmentVariables_UsesLowercaseVariable()
{
Environment.SetEnvironmentVariable("http_proxy", "http://example1.com");
Environment.SetEnvironmentVariable("HTTP_PROXY", "http://example2.com");
var proxy = new ProxyManager();
Assert.That(proxy.Hostname, Is.EqualTo("example1.com"));
Assert.That(proxy.Port, Is.EqualTo(80));
Assert.That(proxy.Username, Is.Null);
Assert.That(proxy.Password, Is.Null);
}