C# String Examples

• String in C#
• Base64 String in C#
• Creating comma separated string
• Convert byte array to string
• Convert string to byte array
• Count string occurrences
• Escape sequences in string
• Convert int to String
• Multiline String Literal
• generate all permutations of a string
• Create random string
• Remove characters from String
• Replace String
• Reverse String
• Split String
• Truncate String
• String Upper Case
• UTF-8 string in C#

C# Basic

• Application in C#
• Config in C#
• Error in C#
• Environment variables in C#

C# Data Type

• Byte in C#
• Number in C#
• String in C#
• List in C#
• Array in C#
• Dictionary in C#
• Enum in C#
• Structure in C#
• DateTime in C#

C# OOP

• Object in C#
• Method in C#

C# IO

• File in C#
• CSV in C#
• JSON in C#
• XML in C#

C# Graphics & UI

• Image in C#
• Color in C#
• Controls in C#

C# Advanced

• Clipboard in C#
• Excel Column in C#
• foreach in C#
• DataTable in C#
• Email in C#
• Guid in C#
• HTTP in C#
• LINQ in C#
• Stream in C#

Remove characters from String in C#

Here are examples of removing non-alphanumeric characters from a string in C#:

• Remove all non-alphabetic characters:

string input = "He11o W@rld!";
string output = new string(input.Where(c => Char.IsLetter(c)).ToArray());
Console.WriteLine(output); // "HelloWorld"

• Remove all non-alphanumeric characters:

string input = "He11o W@rld!";
string output = new string(input.Where(c => Char.IsLetterOrDigit(c)).ToArray());
Console.WriteLine(output); // "He11oWrld"

• Remove all non-alphanumeric characters except spaces:

string input = "He11o W@rld!";
string output = new string(input.Where(c => Char.IsLetterOrDigit(c) || Char.IsWhiteSpace(c)).ToArray());
Console.WriteLine(output); // "He11o W rld"

1. C# remove specific characters from string:

   string input = "Hello, World!";
   char[] charsToRemove = { ',', ' ' };
   string result = new string(input.Where(c => !charsToRemove.Contains(c)).ToArray());
   // Result: "HelloWorld!"
   

2. Remove whitespace from string in C#:

   string input = "   Trim whitespace   ";
   string result = new string(input.Where(c => !char.IsWhiteSpace(c)).ToArray());
   // Result: "Trimwhitespace"
   

3. Deleting characters from a string in C#:

   string input = "Delete these characters";
   string result = input.Replace("delete", string.Empty);
   // Result: " these characters"
   

4. C# remove letters from string:

   string input = "Remove letters and keep numbers: 123";
   string result = new string(input.Where(c => !char.IsLetter(c)).ToArray());
   // Result: " 123"
   

5. Substring removal in C# string:

   string input = "Remove substring";
   string substringToRemove = "substring";
   string result = input.Replace(substringToRemove, string.Empty);
   // Result: "Remove "
   

6. Trimming characters in C# string:

   string input = "Trim these characters from both ends";
   char[] charsToTrim = { 'T', 's', ' ' };
   string result = input.Trim(charsToTrim);
   // Result: "rim these characters from both end"
   

7. C# remove non-alphanumeric characters from string:

   string input = "Remove $pecial ch@racters 123";
   string result = new string(input.Where(c => char.IsLetterOrDigit(c)).ToArray());
   // Result: "Removepecialcharacters123"
   

8. Remove last N characters from string in C#:

   string input = "Remove last 3 characters";
   int charactersToRemove = 3;
   string result = input.Substring(0, input.Length - charactersToRemove);
   // Result: "Remove last "
   

9. Replacing characters in a string C#:

   string input = "Replace characters";
   char charToReplace = 'e';
   char replacementChar = '*';
   string result = input.Replace(charToReplace, replacementChar);
   // Result: "R*plac* charact*rs"
   

10. C# remove duplicate characters from string:

    string input = "Remove duplicate characters";
    string result = new string(input.Distinct().ToArray());
    // Result: "Remove duplicate charctrs"