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List<int> numbers = new List<int>() { 1, 2, 3, 3, 4, 5, 5 };
List<int> uniqueNumbers = numbers.Distinct().ToList();
foreach (int num in uniqueNumbers)
{
Console.WriteLine(num);
}
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List<string> lstWhitDuplicate = new list<string>();
lstWhitDuplicate.add("hallo");
lstWhitDuplicate.add("hallo");
lstWhitDuplicate.add("World");
List<string> lst = lstWhitDuplicate.Distinct().ToList();
// output lstWhitDuplicate:
// hallo hallo world
// output lst:
// hallo word
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List<T> withDupes = LoadSomeData();
List<T> noDupes = withDupes.Distinct().ToList();
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using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
HashSet<int> evenNumbers = new HashSet<int>();
HashSet<int> oddNumbers = new HashSet<int>();
for (int i = 0; i < 5; i++)
{
// Populate numbers with just even numbers.
evenNumbers.Add(i * 2);
// Populate oddNumbers with just odd numbers.
oddNumbers.Add((i * 2) + 1);
}
Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count);
DisplaySet(evenNumbers);
Console.Write("oddNumbers contains {0} elements: ", oddNumbers.Count);
DisplaySet(oddNumbers);
// Create a new HashSet populated with even numbers.
HashSet<int> numbers = new HashSet<int>(evenNumbers);
Console.WriteLine("numbers UnionWith oddNumbers...");
numbers.UnionWith(oddNumbers);
Console.Write("numbers contains {0} elements: ", numbers.Count);
DisplaySet(numbers);
}
private static void DisplaySet(HashSet<int> set)
{
Console.Write("{");
foreach (int i in set)
{
Console.Write(" {0}", i);
}
Console.WriteLine(" }");
}
}
/* This example produces output similar to the following:
* evenNumbers contains 5 elements: { 0 2 4 6 8 }
* oddNumbers contains 5 elements: { 1 3 5 7 9 }
* numbers UnionWith oddNumbers...
* numbers contains 10 elements: { 0 2 4 6 8 1 3 5 7 9 }
*/
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List<int> numbers = new List<int>() { 1, 2, 3, 4, 4, 5, 1, 2, 6 };
List<int> uniqueNumbers = numbers.Distinct().ToList();
// uniqueNumbers will now contain [1, 2, 3, 4, 5, 6]