Finding Repeated Values in List String

Question

I want to check if there are repeated values in the List and if there are any then display print in a txt file

List<String> Die_ID_refrence = new List<String>();
//List stores All Die_ID from t0 sheet
for (int a = 0; a < table5.Rows.Count; a++)
{
Die_ID_refrence.Add(table5.Rows[a]["Die_ID"].ToString());

}

Vulpes · Answer

You could do this (untested): List Die_ID_refrence = new List (); //List stores All Die_ID from t0 sheet List duplicates = new List (); for (int a = 0; a { string s = table5.Rows[a][Die_ID].ToString(); if (Die_ID_refrence.Contains(s)) duplicates.Add(s); Die_ID_refrence.Add(s); // add it whether duplicate or not } File.WriteAllLines(duplicates.txt duplicates.Distinct());