FIlter by date (Invalid filter expression)

[raulandresduque]

I'm experiencing problems when trying to filter by datetime.

e.g. (ODATA v3)
/odata/Contratos?$filter=FechaFinContrato ge datetime'2025-06-02T21:47:22.855097-05:00'&$format=json

This query works fine from POSTMAN but when executed thru Simple.OData.Client, I'm getting error:

Invalid filter expression

Nothing special in the code:

.For()
.Filter(c => c.fecha_fin_contrato >= DateTime.Now)
.FindEntriesAsync()

Any idea?

[EDamsgaard]

Have you tried to create a variable and then use that?

DateTime now = DateTime.Now;
:
.For()
.Filter(c => c.fecha_fin_contrato >= now)
.FindEntriesAsync()