'System.IO.Stream' does not contain a definition for 'CopyTo'

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Hi I am getting the error in my C# Console application

'System.IO.Stream' does not contain a definition for 'CopyTo' and no extension method 'CopyTo' accepting a first argument of type 'System.IO.Stream' could be found (are you missing a using directive or an assembly reference?)

This is my code

C#

HttpWebResponse response = (HttpWebResponse)httpWReq.GetResponse();
using (var stream = File.Create(fileName))
{
    response.GetResponseStream().CopyTo(stream);
}

Pleas help. Thanks in advance

Posted 9-Jan-14 18:07pm

srmohanr

Updated 16-Aug-18 2:27am

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3 solutions

Solution 3

Apologies - I know this is an old post, but as pointed out by ftosteve[^] (in a solution that may be deleted) ...

Quote:
And what if you have to target .NET2?
Changing the project to .NET4 is just cheating

...
This blog[^] from Sam Beauvois gives examples that will target frameworks < .NET 4.0

Posted 28-May-14 5:17am

CHill60

Comments

srmohanr 29-May-14 0:14am

Thanks for your reply.

Richard MacCutchan 16-Aug-18 9:04am

Gave the abuser a kick, needs to be flagged in Spam and Abuse forum.

CHill60 16-Aug-18 9:12am

Done

Solution 2

And what if you have to target .NET2?
Changing the project to .NET4 is just cheating...

Posted 28-May-14 4:49am

ftosteve

Comments

CHill60 28-May-14 10:53am

Then don't use CopyTo! Does this mean that you have the same problem and would like an answer?

CHill60 29-May-14 5:34am

You may not have noticed but I have posted an alternative solution for frameworks < 4

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Karthik_Mahalingam · Accepted Answer · 2014-01-09T18:16:00

Solution 1

Hi mohan

CopyTo is available in dot net Framework 4.0 and above only.

Reference:System.IO CopyTo[^]

Please change your project version to Framework 4.0.
Right Click Project -> Properties - > Application Tab - > Target FrameWork -> select .Net Framework 4.0

Posted 9-Jan-14 18:16pm

Karthik_Mahalingam

Updated 9-Jan-14 18:19pm

v2

Comments

Ron Beyer 10-Jan-14 0:21am

It should be noted that this only works on VS2010 or greater. If he's using 2008 or 2005 he won't have that option.

srmohanr 10-Jan-14 0:28am

Hi, I have VS 2010.

Thanks for your suggesstion.

Karthik_Mahalingam 10-Jan-14 0:41am

Ron,
ya, u r rite..
can we add reference of Framework v4.0 dll to vs 2008 ??

Ron Beyer 10-Jan-14 0:49am

No, there is more than just a "dll", its an entire framework and a different compiler.

Karthik_Mahalingam 10-Jan-14 0:54am

Oh i see.
Now very less number of people are using vs 2008 i guess.
we are in vs 2013 now :)

Ron Beyer 10-Jan-14 0:57am

Not as few as you'd think, a lot of people are stuck in VS2008 and even VS2005.

Karthik_Mahalingam 10-Jan-14 1:09am

:-)

srmohanr 10-Jan-14 0:27am

Thanks for your help. Its working now.

Karthik_Mahalingam 10-Jan-14 0:40am

Welcome mohan,
if it is resolved, pls close this post...

srmohanr 10-Jan-14 0:42am

How to close this post. Please help

Karthik_Mahalingam 10-Jan-14 0:44am

mohan,
you can mark it as answer :)

srmohanr 10-Jan-14 0:45am

Yes. I did :)

Karthik_Mahalingam 10-Jan-14 0:47am

:) Thanks mohan