CA1872.md

Pattern: Call chain over BitConverter.ToString

Issue: -

Description

Use Convert.ToHexString or Convert.ToHexStringLower when encoding bytes to a hexadecimal string representation. These methods are more efficient and allocation-friendly than using BitConverter.ToString in combination with String.Replace to remove dashes and String.ToLower.

Example of incorrect code:

using System;
using System.Text;

class HelloWorldEncoder
{
    private readonly byte[] _data = Encoding.ASCII.GetBytes("Hello World");

    public string Encode()
    {
        return BitConverter.ToString(_data).Replace("-", "");
    }

    public string EncodeToLower()
    {
        return BitConverter.ToString(_data).Replace("-", "").ToLower();
    }
}

Example of correct code:

using System;
using System.Text;

class HelloWorldEncoder
{
    private readonly byte[] _data = Encoding.ASCII.GetBytes("Hello World");

    public string Encode()
    {
        return Convert.ToHexString(_data);
    }

    public string EncodeToLower()
    {
        return Convert.ToHexStringLower(_data);
    }
}

Further Reading

• CA1872