?
Solved

Question on delegate Func<CustType, string, string, byte[]>

Posted on 2013-11-12
1
Medium Priority
?
220 Views
Last Modified: 2014-02-20
The VS2012 (.NET 4.5) compiler complains the following code:

public Func<CustType, String, String, byte[]> TokenServiceImpl { get; set; }

SomeType GetToken(CustType c, String server, string app, out byte[] key)
{
    if (TokenServiceImpl == null) {throw new exception("xxxxx");
   
    // This is the line where it gets compiler error
    return  TokenServiceImpl (c, server, app, out key);
}

Error:  Delegate "Func" does not take 4 arguments.

I have spend quite some on it but still cannot figure it out.
Can someone offer any suggestion? Big thanks in advance.
0
Comment
Question by:chuang4630
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 2000 total points
ID: 39642682
Two things:  1) The error is correct:  Your delegate does not take 4 parameters; it takes 3, with a return type of byte[]    2) The out that you see in Intellisense:

Screenshot
...has to do with the result being covariant, and not as a direct reference to the object in memory like you have with the out keyword. In other words, you don't need out in that statement.

As to how to fix your error, you would need to describe more about what you are trying to accomplish.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question