Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 228
  • Last Modified:

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

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
chuang4630
Asked:
chuang4630
1 Solution
 
käµfm³d 👽Commented:
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.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now