Check out example codes for "convert from data adapter to Ienumerable C#". It will help you in understanding the concepts better.

Code Example 1

But if you do want to use a data table first, you could use LINQ:

var list = dt.AsEnumerable().Select(r => new Person() { 
    Name = (string) r["Name"], 
    Age = (int) r["Age"] }
).ToList()

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