Get Duplicate field Name in single list

Question

Sumit Kesarwani · Answer

Add Where clause to get only groups with more then 1 element and SelectMany to flatten results into one list:

var duplications = lstcar.GroupBy(s => s.CarName)
                        
.Where(g => g.Count() > 1)
                        
.SelectMany(g => g)
                        
.ToList();

I see you won't Zen and zen in the same group, so you should change your GroupBy to: GroupBy(s => s.CarName.ToLower())

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Get Duplicate field Name in single list

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