Compile and Execute C# Sharp Online

using System.IO;
using System;

class Program
{
    static void Main()
    {
        string phone = "9019441572";
        
        bool IsInternational = !phone.Substring(phone.IndexOf("+"), phone.IndexOf("-") + 1).Equals("+91-");
        
        Console.WriteLine("IsInternational:= "+ IsInternational);
        
        
    }
}