Amount of files in Moq request

Question

The SetupGet to for the form (Form) of the request works, however the Count doesn’t work. How to solve for the Count return the desired value?

var httpContextMock = new Mock<HttpContextBase>();
var request = new Mock<HttpRequestBase>();

httpContextMock.SetupGet(x => x.Request).Returns(request.Object);            
httpContextMock.SetupGet(x => x.Request.Form).Returns(form);
httpContextMock.SetupGet(x => x.Request.Files.Count).Returns(2);