How Can I Efficiently Convert Hex Strings to Byte Arrays in C#?

C# Hex String to Byte Array Conversion: A Concise Approach

Directly converting hex strings to byte arrays isn't natively supported in C#. However, a clean and efficient solution leveraging LINQ is readily available.

A Streamlined LINQ Solution

This elegant LINQ-based method elegantly handles the conversion:

<code class="language-csharp">public static byte[] HexStringToByteArray(string hex) {
    return Enumerable.Range(0, hex.Length)
                     .Where(x => x % 2 == 0)
                     .Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
                     .ToArray();
}</code>

This code iterates through the hex string, selecting pairs of characters (representing hexadecimal digits). Convert.ToByte efficiently transforms each pair into its byte equivalent, and the result is compiled into a byte array. The use of LINQ makes the code concise and readable.

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