public void PropertiesAreAccessible()
{
var headers = new HeaderDictionary(
new Dictionary <string, string[]>(StringComparer.OrdinalIgnoreCase)
{
{ "Header1", new[] { "Value1" } }
});
Assert.Equal(1, headers.Count);
Assert.Equal <string>(new[] { "Header1" }, headers.Keys);
Assert.True(headers.ContainsKey("header1"));
Assert.False(headers.ContainsKey("header2"));
Assert.Equal("Value1", headers["header1"]);
Assert.Equal("Value1", headers.Get("header1"));
Assert.Equal(new[] { "Value1" }, headers.GetValues("header1"));
}