struct initialization

Code:

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public struct FullName
{
  public string FirstName;
  public string LastName;

  public FullName(string First)
  {
      this.FirstName = First;
      this.LastName = Demo();
  }

  public string Demo() { return "demo"; }
}

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Gives me the following compile error

Quote:

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The 'this' object cannot be used before all of its fields are assigned to

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If FullName were to be class instead of struct, I don't get compilation errors.

Can anyone explain this to me please ?

You'd probably want to use a CLASS http://msdn.microsoft.com/en-us/library/x9afc042.aspx

It's not a question wether to use struct or class.

I'd just like to know why struct gives me a compile error and class doesn't ?

To find the reason, type the full error into a bing or google search, then read a few replies.

from http://msdn.microsoft.com/en-us/library/w29h4276.aspx

Quote:

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All fields in a struct have to be assigned by a constructor before the constructor can call a method in the struct.

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Btw, you can get rid of this error by calling : this() in the constructor.

Code:

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public FullName(string First)
  : this()
{
 ...
}

---

I had already figured out the :this() solution ;)

Thanks for your explanation on the CS0188 , the specific struct behavior is clear to me now !

Hopefully, the big tip from this post is this:

Quote:

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To find the reason, type the full error into a bing or google search, then read a few replies.

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