class parameters by Ref

Question

I need direction on HOW TO create class in C# that accept parameters by reference,

I am a bit confused with tutorial

 

https://www.tutorialspoint.com/csharp/csharp_reference_parameters

 

Back in time Visual Basic I used to create class/functions that accept parameters by Value and by Reference.

 

ByVal parameter needs to be passed with some value

 

ByRef parameter needs may be empty or has value

//- Let's assume this my function
public string MyObject(int pParamValue1, ref string pParamValue2)
{
     string ResultValue = "Your Result value is";
     ResultValue += pParamValue1.ToString();
     if (pParamValue2 != null)
      {
         ResultValue += " By Reference: " + pParamValue;
      }
     return  ResultValue;
}
//- Using the function passing the parameter by value
string GetResult =  MyObject(20);

//- Using the function passing the parameter by value and parameter by Ref.
string GetResult = MyObject(20,"Hello World");

Am I in the right path?

 

Thanks