Answer Posted / nevin jain

from all 11 above answer only Sachin Gupta have given write
answer...
becoz SqlDataReader inherit DbDataReader whose base type is
IEnumerable that use to access collection through simple
iteration which is forward only manner...

Basically SqlDataReader Class access records n retrieve them
as collection through simple iteration...

to make more clear first read Functionality of IEnumerable
interface that expose GetEnumerator() method...

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