Want to create resource requirement using CRM SDK method

Hi,

I want to create a resource requirement using CRM SDK Method, I tried the below syntax and it throwing error as "Value cannot be null.Parameter name: value"

msdyn_resourcerequirement resourcerequirement = new msdyn_resourcerequirement();
resourcerequirement.msdyn_name = "Test 1";
resourcerequirement.msdyn_allocationmethod = new OptionSetValue(192350000);
resourcerequirement.msdyn_duration = 180;
resourcerequirement.msdyn_IsPrimary = true;
resourcerequirement.msdyn_WorkLocation = new OptionSetValue(690970000);
resourcerequirement.msdyn_Status = new EntityReference("msdyn_requirementstatuses", new Guid("some GUID"));
resourcerequirement.OwnerId = new EntityReference("systemuser", new Guid("some GUID"));
Guid resourcerequirement Id = organizationProxy.Create(resourcerequirement);

Thanks in advance