MSDN implicit operator example C# with Example

class Digit 
{ 
public Digit(double d) { val = d; } 
public double val; 
// User-defined conversion from Digit to double 
public static implicit operator double(Digit d) 
{ 
Console.WriteLine("Digit to double implict conversion called"); 
return d.val; 
} 
// User-defined conversion from double to Digit 
public static implicit operator Digit(double d) 
{ 
Console.WriteLine("double to Digit implict conversion called"); 
return new Digit(d); 
} 
} 
class Program 
{ 
static void Main(string[] args) 
{ 
Digit dig = new Digit(7); 
//This call invokes the implicit "double" operator 
double num = dig; 
//This call invokes the implicit "Digit" operator 
Digit dig2 = 12; 
Console.WriteLine("num = {0} dig2 = {1}", num, dig2.val); 
Console.ReadLine(); 
} 
} 
Output: 
 

Digit to double implict conversion called 
double to Digit implict conversion called 
num = 7 dig2 = 12 
Live Demo on .NET Fiddle