Develop Reference

Utils.GetFileInfo error

I'm going through the sample projects of EPPlus and finally reached the part that I'm interested in. I would like to import contents of a .txt file. Sample 9 shows how to do this, but I get an error I can't seem to fix.
The error message:
The type or namespace name "GetFileInfo" doesn't exist in the namespace 'OfficeOpenXml.Utils'(are you missing an assembly reference?)
The code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OfficeOpenXml;
using System.IO;
using OfficeOpenXml.Table;
using OfficeOpenXml.Drawing.Chart;
using System.Globalization
...
FileInfo newFile = Utils.GetFileInfo(#"\sample9.xlsx");
Does anyone encountered this issue? Thanks in advance!
Edit: If I open directly the sample file I don't get any errors, only if I try to do it in my own project.

Try this:
var file = new System.IO.FileInfo(fullpathandfilename);

TcpChannel could not be found

I'm following a lab tutorial on .NET remoting and for that I need to create TcpChannel object. For that I have added using System.Runtime.Remoting namespace but it still gives me an error The type or namespace name 'TcpChannel' could not be found (are you missing a using directive or an assembly reference?)
I'm using Visual Studio 2015 Community Edition. I can't figure out what is causing this problem. I even googled it. Here's my code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Remoting;
namespace RemotingServer
{
class Program
{
static void Main(string[] args)
{
TcpChannel channel = new TcpChannel(8001);
}
}
}

The TcpChannel class is located in System.Runtime.Remoting.Channels.Tcp, so you have to get using that. Also check if you reference System.Runtime.Remoting.dll in your project.

The type or namespace name 'Uri' could not be found: (System.Uri namespace is included)

I am learning ASP.NET by following one online tutorial (building web application). Problem is when I reuse tutor code I stuck on this error:
Error 1 The type or namespace name 'Uri' could not be found (are you missing a using directive or an assembly reference?)
I tried to include several namespaces (like System.Uri) and none of them worked. Does someone knows where's the problem and what do I need to do to solve the problem?
Here is code:
using System.Collections.Generic;
using System.Net;
using System.Linq;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity;
using System.Web;
using System.Web.Http;
using System.Net.Http;
using System.Data.Entity.Infrastructure;
using System.Uri;
public HttpResponseMessage Post(Friend friend)
{
if (ModelState.IsValid)
{
db.Friends.Add(friend);
db.SaveChanges();
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, friend);
response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = friend.FriendId }));
return response;
}
else
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
}

You can't have using System.Uri;, since Uri is a class (and static import isn't allowed until Visual Studio 2015, which I suppose you are not using now, even in VS 2015, it would fail since Uri is not a static class)
Include:
using System;
and remove
using System.Uri;

from microsoft doc
http://msdn.microsoft.com/en-us/library/system.uri%28v=vs.110%29.aspx
the refence to include is System.dll This should be there by default. Check if you did not delete it by mistake.

CS0246: The type or namespace name 'userName' could not be found (are you missing a using directive or an assembly reference?)

Just bumping this, no solution as yet...
I have a CRUD web app built in C# that updates a SQL Db. When I test it on my local machine it works fine, but when I upload to our intranet server it breaks, throwing up the
error:
CS0246: The type or namespace name 'userName' could not be found (are you missing a using directive or an assembly reference?)
I have the namespace referenced in my backend file:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using userName;
using System.Data;
This is how I'm calling it:
//get user name from uName.cs
uName obj = new uName();
string var = obj.ShowName();
uName.cs code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.DirectoryServices;
using System.Web.Hosting;
/// <summary>
/// Summary description for uName
/// </summary>
namespace userName
{
public class uName
{
public uName()
{
} //constructor end
public string ShowName()
{
.......
}
There are a number of methods following the constructor...
The userName namespace is held in the uName.cs file which is inside the App_Code folder.
I know this is a pretty common problem and I've done extensive research before posting the question...
I've tried the lots of solutions from SO but they don't fix the problem including:
The type or namespace name 'User' could not be found (are you missing a using directive or an assembly reference?)
The type or namespace name could not be found

namespace name 'DispatcherTimer' could not be found

I am trying to use a dispatch timer, but my c# app can't find the namespace. This is the error:
The type or namespace name 'DispatcherTimer' could not be found (are you missing a using directive or an assembly reference?)
Here is what I am using:
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Globalization;
using System.Text;
using System.Threading;
using System.Timers;
using System.Windows.Forms;
Here is the code:
DispatcherTimer timer1 = new DispatcherTimer();

DispatcherTimer is not a namespace - it's a class within the System.Windows.Threading namespace and the WindowsBase assembly. So you need
using System.Windows.Threading;
In general, a search for the missing type name and "MSDN" is enough to find out where to find a type.

The Dispatcher class is in WindowsBase.dll. You MUST add that reference to your project to use "using System.Windows.Threading;" <>

Add this using:
using System.Windows.Threading;
MSDN

Isn't in the System.Windows.Threading namespace and not the System.Threading namespace?
http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatchertimer.aspx

You must Add WindowsBase in your references so you can use the System.Windows.Threading.