.NET 6 cryptographic random string generator

RandomStringGenerator.cs

public static class RandomStringGenerator
{
	public static string Next(int length)
	{
		var chars = new byte[length];

		for (var i = 0; i < length;)
		{
			// 0-9: 48-57
			// A-Z: 65-90
			var next = RandomNumberGenerator.GetInt32(48, 91);

			// Ensure generated value doesn't fall between 58-64
			if (next < 58 || next > 64)
			{
				chars[i] = Convert.ToByte(next);
				i++;
			}
		}

		return Encoding.UTF8.GetString(chars);
	}
}