use different option for xml date/time converstion to get local time

HashingTool/Helper/HashingHelper.cs

@@ -115,7 +115,7 @@ namespace HashingTool.Helper
 					hashedXML.DigestValueRead = h.ReadHash();
 					var dateNode = xml.SelectSingleNode("//*[local-name()='Date']");
 					hashedXML.Date = dateNode != null
-						? XmlConvert.ToDateTime(dateNode.InnerText, XmlDateTimeSerializationMode.RoundtripKind)
+						? XmlConvert.ToDateTime(dateNode.InnerText, XmlDateTimeSerializationMode.Local)
 						: (DateTime?)null;
 				} catch {
 					hashedXML.DigestValueRead = "";

HashingTool/ViewModel/UserControl/VectoJobFile.cs

@@ -100,7 +100,7 @@ namespace HashingTool.ViewModel.UserControl
 			if (nodes == null || nodes.Count == 0) {
 				return null;
 			}
-			return XmlConvert.ToDateTime(nodes[0].InnerText, XmlDateTimeSerializationMode.RoundtripKind);
+			return XmlConvert.ToDateTime(nodes[0].InnerText, XmlDateTimeSerializationMode.Local);
 		}
 
 		private string DoReadVIN()

VectoCommon/VectoHashing/VectoHash.cs

@@ -328,7 +328,7 @@ namespace TUGraz.VectoHashing
 		public DateTime GetCertificationDate(VectoComponents component, int idx)
 		{
 			var nodes = GetNodes(component, idx);
-			return XmlConvert.ToDateTime(ReadElementValue(nodes[idx], XMLNames.Component_Date), XmlDateTimeSerializationMode.RoundtripKind);
+			return XmlConvert.ToDateTime(ReadElementValue(nodes[idx], XMLNames.Component_Date), XmlDateTimeSerializationMode.Local);
 		}
 
 		private string ReadElementValue(XmlNode xmlNode, string elementName)