C#: Create a new string from a given string where a specified character have been removed except starting and ending position of the given string

Last update on June 25 2025 13:02:56 (UTC/GMT +8 hours)

Remove Character Except First and Last

Write a C# Sharp program to create a string from a given string where a specified character is removed except for the beginning and ending positions.

Visual Presentation:

Sample Solution:-

C# Sharp Code:

using System;
using System.Linq;

namespace exercises
{
    // Class declaration
    class Program
    {
        // Main method - entry point of the program
        static void Main(string[] args)
        {
            // Calling the 'StringX' method with different strings and characters
            Console.WriteLine(StringX("xxHxix", "x"));   // Output: xHix
            Console.WriteLine(StringX("abxdddca", "a")); // Output: bxdddc
            Console.WriteLine(StringX("xabjbhtrb", "b"));// Output: xajhtr
            Console.ReadLine(); // Keeping the console window open
        }

        // Method to remove occurrences of a specific character 'c' except for the first and last occurrences in a string 'str1'
        public static string StringX(string str1, string c)
        {
            // Iterate through the characters in the string 'str1' starting from the second last character
            for (int i = str1.Length - 2; i > 0; i--)
            {
                // Check if the current character is equal to the given character 'c'
                if (str1[i] == c[0])
                {
                    // If so, remove that character from the string 'str1'
                    str1 = str1.Remove(i, 1);
                }
            }

            return str1; // Return the modified string 'str1'
        }
    }
}

Sample Output:

xHix
abxdddca
xajhtrb

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C# program to remove all vowels from a string except those at the first and last positions.
• Write a C# program to remove all digits from a string except those at the beginning and end.
• Write a C# program to remove a given set of characters from a string, keeping only the first and last occurrence of each.
• Write a C# program to remove all special characters from a string except those that appear at the first and last index.

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