When should we use Ienumerable over List in C#?

Hi Vinod, IEnumerable is an interface, While List is class that defines generic collection List implements from IEnumerable interface. List allow you to access you specific index by using internal index IEnumerable doesn't allow you to random access like List. Usage : When you just want to loop through without any operation like Add or delete at specific index that time you can go for IEnumerable. Performance : In term of performance, iterating values from IEnumerable is much faster than iterating values from a List. Thanks.