The string may have two or more same characters in it but we want it to have only one. So let’s look at an example to understand it better.
C# Program
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using System;
using System.Linq;
class Program
{
static void Main()
{
string value1 = RemoveDuplicateChars("DotneTOffice");
string value5 = RemoveDuplicate("Line1\nLine2\nLine3");
Console.WriteLine(value1);
Console.WriteLine(value5);
Console.ReadLine();
}
static string RemoveDuplicateChars(string input)
{
input = input.ToUpper();
string TempResult = "";
string result = "";
foreach (char value in input)
{
// See if character is in the table.
if (TempResult.IndexOf(value) == -1)
{
// Append to the table and the result.
TempResult += value;
result += value;
}
}
return result;
}
// Another method to remove duplicate char
static string RemoveDuplicate(string input)
{
input = input.ToUpper();
string DistinctString = new string(input.Distinct().ToArray());
return DistinctString;
}
}
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