Extension method to remove accents

StringExtensions.cs

using System.Globalization;
using System.Text;

public static class StringExtensions
{
    public static string RemoveAccents(this string textInput)
    {
        if (string.IsNullOrEmpty(textInput))
        {
            return string.Empty;
        }

        var sb = new StringBuilder();
        
        var arrayText = textInput.Normalize(NormalizationForm.FormD).ToCharArray();

        foreach (char letter in arrayText)
        {
            if (CharUnicodeInfo.GetUnicodeCategory(letter) != UnicodeCategory.NonSpacingMark)
                sb.Append(letter);
        }
        return sb.ToString();
    }

}