C# Lang Question

[Raed Sawalha]

I still beginner in C# and i wondering what below line (*) means

public abstract class DataCollection : ICollection, ISerializable,
IDeserializationCallback
{
private const int defaultCapacity = 8;

protected DataCollection() : this(defaultCapacity)
//(*) This Line why colon after constructor, What is means?
{
}
}

[Eliyahu Goldin]

Constructor with no parameter DataCollection() will call another constructor
with a parameter DataCollection(defaultCapacity)

Eliyahu

"Raed Sawalha" <Ra*********@discussions.microsoft.com> wrote in message
news:E0**********************************@microsof t.com...

I still beginner in C# and i wondering what below line (*) means

public abstract class DataCollection : ICollection, ISerializable,
IDeserializationCallback
{
private const int defaultCapacity = 8;

protected DataCollection() : this(defaultCapacity)
//(*) This Line why colon after constructor, What is means?
{
}
}

[Karl Seguin]

Just to give an example:

public class User(){
private int userId;
publlic int UserId{
get { return userId}
public void User() : this(1000){}
public void User(int userId){
this.userId= userId
}
}
User user1 = new User();
Response.Write(user1.UserId); //will output 1000

notice how I call the constructor with no parameters, but UserId = 1000
that's because the User() constructor called the User(int userId)
constructor....

Karl

"Eliyahu Goldin" <re*************@monarchmed.com> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

Constructor with no parameter DataCollection() will call another constructor with a parameter DataCollection(defaultCapacity)

Eliyahu

"Raed Sawalha" <Ra*********@discussions.microsoft.com> wrote in message
news:E0**********************************@microsof t.com...

I still beginner in C# and i wondering what below line (*) means

public abstract class DataCollection : ICollection, ISerializable,
IDeserializationCallback
{
private const int defaultCapacity = 8;

protected DataCollection() : this(defaultCapacity)
//(*) This Line why colon after constructor, What is means?
{
}
}

[Cowboy (Gregory A. Beamer) - MVP]

Constructor chaining. This constructor is calling another constructor that
looks like so:

protected DataCollection(int capacity)
{
}
---

Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

***************************
Think Outside the Box!
***************************
"Raed Sawalha" wrote:

I still beginner in C# and i wondering what below line (*) means

public abstract class DataCollection : ICollection, ISerializable,
IDeserializationCallback
{
private const int defaultCapacity = 8;

protected DataCollection() : this(defaultCapacity)
//(*) This Line why colon after constructor, What is means?
{
}
}

[Flip]

> Constructor chaining. This constructor is calling another constructor that
Extremely useful feature for saving yourself from rewriting code multiple
times!

You have the more genereic constructors (less arguments) calling the most
complicated one, passing in appropriate defaults.

Good luck! :>