How to use threading in the online compiler?

Question

using System;

class HelloWorld 
{
  static void Main()
  {
    string intro="Hello World"
    
        for(int i=0;i<intro.Length;i++);
    {
        System.Console.WriteLine(intro[i])
        
        System.Threading.Thread.Sleep(50);
    }
  }
}

I believe this should type each letter like a typewriter.
The above code starts at line 9.

I am getting these errors:

main.cs(17,8): error CS1525: Unexpected symbol `for'
main.cs(17,38): error CS1525: Unexpected symbol `)', expecting `;' or `}'

Answer 1

Please correct syntax errors:

string intro="Hello World" , need ';' at end of Line

  for(int i=0;i<intro.Length;i++); , loose the ';' at end of line (not syntax error , but logical error)

  System.Console.WriteLine(intro[i]) , add ; at end of line