Thank you for your comment and answer it work now,
this is my function
public static EntityMetadata[] GetEntities ( IOrganizationService organizationService)
{
Dictionary<string, string> attributesData = new Dictionary<string, string>();
RetrieveAllEntitiesRequest metaDataRequest = new RetrieveAllEntitiesRequest();
RetrieveAllEntitiesResponse metaDataResponse = new RetrieveAllEntitiesResponse();
metaDataRequest.EntityFilters = EntityFilters.Entity;
// Execute the request.
metaDataResponse = (RetrieveAllEntitiesResponse)organizationService.Execute(metaDataRequest);
var entities = metaDataResponse.EntityMetadata;
return entities;
}
and i call my function in the windows app form like this:
var allEntities = CRMHelpers.GetEntities(service);
foreach (EntityMetadata Entity in allEntities)
{
cbxEntity.Items.Add(Entity.LogicalName);
}
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