how to Find and count duplicate numbers in a string array in vb.net?

Question

how to count the duplicate numbers exist in a string or integer array in vb.net?

Dim a as string = \"3,2,3\"

from the above

Answer 1

If you have a string like in your example start by splitting it according to your delimiter ; then you can use a GroupBy Linq query :

Dim source = "3,2,3".Split(","c)

Dim query = From item In source
            Group By item Into Count()

For Each result In query
    Console.WriteLine (result)
Next

' output
' { item = 3, Count = 2 }
' { item = 2, Count = 1 }