How to get token using request.header

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ASP.NET

web_application

Hi,
In jquery ajax function I am passing token and id with header as below as a cross domain request
$.ajax({

error: function (xhr, status, error) { alert(error); },
                    beforeSend: setHeader
                });

function setHeader(xhr) {
            xhr.setRequestHeader('X-ProspectAppApiKey', '8EJBD14I:f9a2ac88-6a76-48cf-vcvcvc-3f54bb830703');
        }

Now at service end I want to get header '8EJBD14I:f9a2ac88-6a76-48cf-vcvcvc-3f54bb830703" using

request.Headers.GetValues("Access-Control-Request-Method");

but I am getting only X-ProspectAppApiKey not 8EJBD14I:f9a2ac88-6a76-48cf-vcvcvc-3f54bb830703 with this please help .

Thanks