/// <summary>
/// Create a new instance of a Research File.
/// </summary>
/// <returns></returns>
public static Entity.PimsResearchFile CreateResearchFile(this PimsContext context, long?researchFileId = null, string rfileNumber = null)
{
var statusType = context.PimsResearchFileStatusTypes.FirstOrDefault() ?? throw new InvalidOperationException("Unable to find research status type.");
var researchFile = EntityHelper.CreateResearchFile(statusType: statusType, researchFileId: researchFileId, rfileNumber: rfileNumber);
context.PimsResearchFiles.Add(researchFile);
return(researchFile);
}