Error: ‘System.Array’ does not contain a definition for ‘FirstOrDefault’ and no extension method ‘FirstOrDefault’ accepting a first argument of type ‘System.Array’ could be found


Error: ‘System.Array’ does not contain a definition for ‘FirstOrDefault’ and no extension method ‘FirstOrDefault’ accepting a first argument of type ‘System.Array’ could be found (are you missing a using directive or an assembly reference?)

Description: When we trying to use FirstOrDefault to an object this error pop’s up. The reason behind is that we not providing the correct references.

Solution: Add reference, using System.Linq;

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