исправил models

CaseAccounting/CaseAccountingDataBaseImplement/Models/Case.cs

@@ -34,9 +34,13 @@ namespace CaseAccountingDataBaseImplement.Models
         [Required]
         public int SpecializationId { get; set; }
 
+        public virtual Specialization Specialization { get; set; } = new();
+
         [Required]
         public int UserId { get; set; }
 
+        public virtual User User { get; set; } = new();
+
         [ForeignKey("CaseId")]
         public virtual List<Hearing> Hearings { get; set; } = new();
 

CaseAccounting/CaseAccountingDataBaseImplement/Models/Contract.cs

@@ -28,6 +28,8 @@ namespace CaseAccountingDataBaseImplement.Models
         [Required]
         public int UserId { get; set; }
 
+        public virtual User User { get; set; } = new();
+
         [ForeignKey("ContractId")]
         public virtual List<LawyerContracts> LawyerContracts { get; set; } = new();
 

CaseAccounting/CaseAccountingDataBaseImplement/Models/Deal.cs

@@ -27,6 +27,8 @@ namespace CaseAccountingDataBaseImplement.Models
         [Required]
         public int UserId { get; set; }
 
+        public virtual User User { get; set; } = new();
+
         [ForeignKey("DealId")]
         public virtual List<CaseDeal> CaseDeals { get; set; } = new();