What is Unicode character in C# ?
Unicode is a universal Character encoding standard that aims to represent every character from every writing system used in the world. It provides a unique numeric value (code point) for each character, including letters, digits, punctuation marks, symbols, and control characters. This encoding allows computers to store, manipulate, and display text in different languages and scripts without needing different character sets for each language.
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What is an example of a Unicode character?
In Unicode, characters are represented by unique hexadecimal numbers, such as U+0041 for the uppercase letter 'A', U+00E9 for the letter 'é', and so on. The code point for each character is written as "U+" followed by a sequence of four to six hexadecimal digits.
For example:
U+0041 represents the letter 'A'
U+2665 represents the heart symbol '♥'
U+03B1 represents the Greek letter alpha 'α'
What are all Unicode characters?
The Unicode standard continues to evolve, and new characters are added with each new version. To know all Unicode Characters, Refer Wikipedia page.
C# replace Unicode character in string
There are many ways to find and replace Unicode character in a string using c# code, One of which is using regular expressions.
Regular expressions allow you to specify patterns that can match specific characters or character ranges. You can then use the Regex class in C# to perform the matching and replacement.
Here's an example of how you can achieve this:
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
string input = "Hello, this is a sentence with some Unicode characters: \u2022 and \u00A9";
string output = RemoveUnicodeCharacters(input);
Console.WriteLine("Original: " + input);
Console.WriteLine("Processed: " + output);
}
static string RemoveUnicodeCharacters(string input)
{
// Define the regular expression pattern to match any Unicode character
string pattern = @"[^\u0000-\u007F]";
// Use the Regex.Replace method to remove Unicode characters by replacing them with an empty string
string result = Regex.Replace(input, pattern, "");
return result;
}
}
In this example, the RemoveUnicodeCharacters method uses a regular expression pattern [^\u0000-\u007F] to match any Unicode character outside the ASCII range (ASCII characters have code points from U+0000 to U+007F). The Regex. Replace method replaces these characters with an empty string, effectively removing them from the input text.
Note that by using this approach, you'll remove all non-ASCII characters from the input text. If you want to keep some specific non-ASCII characters while removing others, you can modify the regular expression pattern accordingly.
