C# Online Compiler | .NET Fiddle

using System;
					
public class Program
{
	public static void Main()
	{
		Car c = new Car("Ford","Focus");
		Console.WriteLine(c.ToString());
	}
}

public class Car
{ 
       string Make {get;set;}
       string Model {get;set;}
       public Car(string make, string model)
       { 
              this.Make = make;
              this.Model = model;
       }
 
    public override string ToString()
    {
        return string.Format("This is a Car made by: {0} and the Model of the Car is: {1}", this.Make, this.Model);
    }
}

 
using System;
                    
public class Program
{
    public static void Main()
    {
        Car c = new Car("Ford","Focus");
        Console.WriteLine(c.ToString());
    }
}
​
public class Car
{ 
       string Make {get;set;}
       string Model {get;set;}
       public Car(string make, string model)
       { 
              this.Make = make;
              this.Model = model;
       }
 
    public override string ToString()
    {
        return string.Format("This is a Car made by: {0} and the Model of the Car is: {1}", this.Make, this.Model);
    }
}

Compilation error (line 1, col 7): The type or namespace name 'Systems' could not be found (are you missing a using directive or an assembly reference?)