How Can I Replace Multiple Spaces with a Single Space in C#?

Streamlining Strings: Removing Excess Spaces in C#

Many programming tasks require cleaning up text data, and a common need is to condense multiple spaces into single spaces. This concise guide demonstrates how to efficiently achieve this in C#.

The Solution: Leveraging Regular Expressions

C#'s Regex class provides a powerful and elegant solution:

<code class="language-csharp">using System.Text.RegularExpressions;

// Sample string with multiple spaces
string inputString = "This  string   has   too   many   spaces.";

// Replace multiple spaces with a single space
string outputString = Regex.Replace(inputString, @"\s+", " "); </code>

Explanation:

• Regex.Replace(): This method replaces all occurrences of a pattern (regular expression) within a string.
• @"s ": This regular expression pattern matches one or more whitespace characters (s). The quantifier ensures that at least one space is matched.
• " ": This is the replacement string—a single space.

The resulting outputString will be:

<code>This string has too many spaces.</code>

Important Considerations:

• All Whitespace: This approach replaces all whitespace characters (spaces, tabs, newlines, etc.) with a single space.
• Consecutive Spaces Only: If you only need to replace consecutive spaces, use a slightly modified pattern: Regex.Replace(inputString, @" {2,}", " "). This specifically targets two or more spaces.

This method offers a clean and efficient way to normalize spacing in your C# strings.

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