How to Resolve the 'Self Referencing Loop Detected' Exception in JSON.Net When Serializing a List of Objects?

JSON.Net "Self Referencing Loop Detected" Exception

The "Self Referencing Loop Detected" exception in JSON.Net occurs when there is a circular reference in the data being serialized. In the provided code, this exception is encountered when attempting to serialize a List of Route objects due to a loop in the object graph.

Exception Details

The exception message indicates that a self-referencing loop was detected in the PartNumber entity. Specifically, the path "routes[0].incomingLots[0].partNumber.partType.partNumbers" contains a loop, meaning that the JSON representation of the Route list would contain references to itself.

Solution

To fix this issue and prevent the loop, modify the DbContext class constructor to disable lazy loading and proxy creation:

public YourDbContext() : base("name = YourDbContext")
{
    // Disable lazy loading and proxy creation
    this.Configuration.LazyLoadingEnabled = false;
    this.Configuration.ProxyCreationEnabled = false;
}

By doing this, you are instructing the DbContext to not automatically load related entities and create proxies for them. This will break the circular reference and allow the Routes list to be serialized successfully.

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