using System.Globalization;
public static void Main()
string value = string.Empty;
var exportResearchObject = new {
MeasuredValue = "17644.804268057036"
Console.WriteLine(exportResearchObject.MeasuredValue);
if (double.TryParse(exportResearchObject.MeasuredValue, out double measuredValue))
value = string.Format(new CultureInfo("nl-nl"), "{0:N0}", measuredValue);
Console.WriteLine(value);