using System;
using System.Globalization;
public class Program
{
public static void Main()
var texto = "20250830";
var provider = new CultureInfo("pt-BR");
var format = "yyyyMMdd";
//DateTime.TryParseExact(texto, "yyyyMMdd", provider, System.Globalization.DateTimeStyles.AllowWhiteSpaces |System.Globalization.DateTimeStyles.AdjustToUniversal, out DateTime datahora);
var data = DateTime.ParseExact(texto, format, provider);
Console.WriteLine(data);
}