Hex Strings to Byte Arrays: Built-in C# Function or Custom Method?

Efficiently Converting Hex Strings to Byte Arrays in C#

Working with hexadecimal strings often necessitates converting them into byte arrays. While a custom function is feasible, C# provides a built-in approach for streamlined conversion.

Leveraging C#'s Built-in Functionality

This task is elegantly handled using a combination of LINQ methods. Enumerable.Range generates a sequence of integers, which are then filtered to select even indices using Where(x => x % 2 == 0). This ensures we process the hex string two characters at a time.

The Select method transforms each pair of characters into a byte using Convert.ToByte(hex.Substring(x, 2), 16). This function interprets the substring as a hexadecimal value and converts it to its byte equivalent.

Finally, ToArray() assembles the resulting bytes into a byte array. This method offers a concise and efficient solution for converting hex strings to byte arrays in C#.

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