由于标准字符串比较就是这样做的，因此可以使用OrderBy：

var input = new[] { "Hello", "#Test", "@Red", "&While", "123@Test", "@123Test", "%54Sun", "Dom", "Left" };
foreach (var s in input.OrderBy(x => x)) Console.WriteLine(s);

提供：

@123Test
@Red
&While
#Test
%54Sun
123@Test
Dom
Hello
Left

由于字符串比较与区域性相关，因此根据当前区域性得不同，此比较可能会有所不同.如果希望它与区域性无关，请使用例如OrderBy(x => x, StringComparer.InvariantCulture) .

您可以使用IComparer的自定义实现，然后将其传递给OrderBy调用。例如：

public class SpecialCharactersNumbersLettersComparer : IComparer<string>
{
    private readonly IComparer<string> defaultComparer = StringComparer.InvariantCulture;
    
    private static int OrderOfChar(char ch)
    {
        if(Char.IsLetter(ch))
            return 2;
        if(Char.IsDigit(ch))
            return 1;
        return 0;
    }
    
    public int Compare(string left, string right)
    {
        if(string.IsNullOrEmpty(left)
          || string.IsNullOrEmpty(right)) {
            return defaultComparer.Compare(left, right);
        }
        
        var leftChar = left[0];
        var rightChar = right[0];
        var leftOrder = OrderOfChar(leftChar);
        var rightOrder = OrderOfChar(rightChar);
        
        if(leftOrder == rightOrder)
            return defaultComparer.Compare(left, right);
        
        if(leftOrder > rightOrder)
            return 1;
        return -1;
    }
}

public static List<string> SortSpecialCharactersNumbersAlphabet(IEnumerable<string> input)
{
    return input.OrderBy(_ => _, new SpecialCharactersNumbersLettersComparer())
        .ToList();
}

用作：

Console.WriteLine(string.Join(", ",
    SortSpecialCharactersNumbersAlphabet(new [] {
    "Hello", "#Test", "@Red", "&While", "123@Test", "@123Test", "%54Sun", "Dom", "Left"})));

产生输出：

@123Test, @Red, &While, #Test, %54Sun, 123@Test, Dom, Hello, Left