UPDATE. Never mind, solved it by passing yyyy-mm-dd instead.

Hi everybody,

I'm trying to pass the following:

api/maxKeysOnServer/purgeFingerprintData/20161228/false

The method is defined in API Controller this way:

[Route("purgeFingerprintData/{cutoffDate}/{purgeExpiredPasses}")]
        [HttpGet]
        public IHttpActionResult PurgeFingerprintData(DateTime cutoffDate, Boolean purgeExpiredPasses)
        {

When I try to send this to my web api, I am getting this error

Error>
<Message>An error has occurred.</Message>
<ExceptionMessage>
The 'ObjectContent`1' type failed to serialize the response body for content type 'text/xml; charset=utf-8'.
</ExceptionMessage>
<ExceptionType>System.InvalidOperationException</ExceptionType>
<StackTrace/>
<InnerException>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Type '<>f__AnonymousType106`2[System.String,System.String]' cannot be serialized. Consider marking it with the DataContractAttribute attribute,
 and marking all of its members you want serialized with the DataMemberAttribute attribute. 
If the type is a collection, 
consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET
 Framework documentation for other supported types.
</ExceptionMessage>
<ExceptionType>
System.Runtime.Serialization.InvalidDataContractException
</ExceptionType>

I am not sure what should I do to make this work. Do I pass my date in the wrong format?

Thanks in advance.