Input string was not in a correct format. | C# Online Compiler

Input string was not in a correct format. by Anonymous

using System;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine("\{\n    \"username\": \"{0}\",\n    \"password\": \"{1}\"\n}\", "test", "test");
	}
}

 
using System;
                    
public class Program
{
    public static void Main()
    {
        Console.WriteLine("\{\n    \"username\": \"{0}\",\n    \"password\": \"{1}\"\n}\", "test", "test");
    }
}

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