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Possible errors in Entity Framework Core and their solutions

 1) This error is exactly same as the self referencing error in the ASP.NET when using swagger UI.
Solution:
If you are using .NET Core. Using this in startup.cs file
services
.AddMvc()
.AddJsonOptions(x => x.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore);

2)

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