This question already has an answer here: Qbject.Equal in Linq to Entity Where Statement Not Working (1 answer) Closed 3 days ago. My data class: using System; using System.Collections.Generic; using System.ComponentModel; using System.ComponentModel.DataAnnotations; using static iText.StyledXmlParser.Jsoup.Select.Evaluator; namespace WebApi.Entities { public class AgentTask : IEquatable<AgentTask>, IComparable<AgentTask> { [DefaultValue(“1”)] [Key] public int FunctionId { get; set; } […]