From another answer on Stackoverflow is a conversion from Javascript date to .net DateTime:
long msSinceEpoch = 1260402952906; // Value from Date.getTime() i
With Moment.js simply use:
var jsDate = moment(netDateTime).toDate();
Where netDateTime is your DateTime variable serialized, something like "/Date(1456956000000+0200)/".
netDateTime
"/Date(1456956000000+0200)/"