The Guid property of the ConfigData class represents a unique identifier for the configuration data. This property is of type System.Guid and is used to uniquely identify instances of configuration data within the Sandbox environment.

The property is decorated with the JsonPropertyName attribute, which specifies that when serialized to JSON, the property should be named __guid. This is useful for ensuring consistent naming conventions when the data is serialized and deserialized.

The Hide attribute indicates that this property should be hidden from certain user interfaces or tools that automatically generate UI elements based on class properties. This is typically used to prevent clutter or to hide implementation details that are not relevant to the end user.

To use the Guid property, you can access it directly from an instance of the ConfigData class. This property is read-only and is typically set internally within the class to ensure that each instance of ConfigData has a unique identifier.

Example usage:

ConfigData configData = new ConfigData();
System.Guid uniqueId = configData.Guid;
// Use uniqueId as needed

When serializing the ConfigData object to JSON, the Guid property will appear as __guid in the JSON output.