Find the duplicates With button click and i want to list out the duplicates [closed]

18 hours ago 1
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If I create one textbox and enter some numbers with comma separation with duplicates also, and I click the "find the duplicates" button, I want to list out the duplicates.
Example: TextBox Values 1, 2, 3, 3, 4, 5, 6, 6, 6, like that
when i click the button Find Duplicates, the output is like 3 has one duplicate, 3-1.
6 has two duplicates: 6-2.
AND, one save button: when i click the button, all the values i enter in text box are stored, and when i click the Remove and Save button, the duplicates are removed and stored.
exactly what i want is to enter some value in text box and click the find duplicate button using array concept
Tools: ASP.NET, C#, SQL SERVER

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