Pass by Reference in C#

Question

How to pass a parameter as a Reference in C# and when calling the function how should i represent it while defining that particular function

Answer 1

As others have said, you should use the ref modifier at both the call site and the method declaration to indicate that you want to use by-reference semantics. However, you should understand how by-value and by-reference semantics interact with the "value type" vs "reference type" model of .NET.

I have two articles on this:

• Parameter passing in C#
• Reference types and value types

Answer 2

Here's an example of passing an int by reference:

void DoubleInt(ref int x)
{
    x += x;
}

and you would call it like this:

DoubleInt(ref myInt);  

Here's an msdn article about passing parameters.

Answer 3

You can use the ref keyword to pass an object by refence.

public void YourFunction(ref SomeObject yourReferenceParameter)
{
    // Do something 
}

When you call it you are also required to give the ref keyword.

SomeObject myLocal = new SomeObject();

YourFunction(ref myLocal);

Answer 4

I suggest you take a look at the MSDN documentation about this. It's very clear.

Answer 5

Just add ref keyword as prefix to all arguments in the function definition. Put ref keyword prefix in arguments passed while calling the function.

Answer 6

you can also reference types without need to user ref keyword
For example you can bass an instance of Class to a method as a parameter without ref keyword