Datetime parsing fix, stop converting to local Kind (#2171)

Author: mvoxland

Radzen.Blazor/ExpressionParser.cs

@@ -739,6 +739,7 @@ private Expression ParseStaticInvocation(Type type, string methodName, Parameter
             nameof(DateTimeOffset) => typeof(DateTimeOffset),
             nameof(Guid) => typeof(Guid),
             nameof(CultureInfo) => typeof(CultureInfo),
+            nameof(DateTimeStyles) => typeof(DateTimeStyles),
             nameof(Double) or "double" => typeof(double),
             nameof(Single) or "float" => typeof(float),
             nameof(Int32) or "int" => typeof(int),

Radzen.Blazor/ExpressionSerializer.cs

@@ -205,7 +205,7 @@ private string FormatDateTime(DateTime dateTime)
         var finalDate = dateTime.TimeOfDay == TimeSpan.Zero ? dateTime.Date : dateTime;
         var dateFormat = dateTime.TimeOfDay == TimeSpan.Zero ? "yyyy-MM-dd" : "yyyy-MM-ddTHH:mm:ss.fffZ";
 
-        return $"DateTime.Parse(\"{finalDate.ToString(dateFormat, CultureInfo.InvariantCulture)}\", CultureInfo.InvariantCulture)";
+        return $"DateTime.Parse(\"{finalDate.ToString(dateFormat, CultureInfo.InvariantCulture)}\", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind)";
     }
 
     private string FormatEnumerable(IEnumerable enumerable)