Generic HashTable in C#

I am getting this error at this line in my code: ImgThnail.Save(ThumbnailPath, Img.RawFormat);

Here is the entire code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Drawing;


    public static class Thumb2
    {
        public static string createThumb(this HttpServerUtility srv, string endPath, string tempPath, int relSize)
        {

            string ThumbnailPath = srv.MapPath("~\\Thumb\\" + endPath);
            string dimensions;
            using (System.Drawing.Image Img = System.Drawing.Image.FromFile(srv.MapPath("~\\" + tempPath))) 
            {
                Size ThumbNailSize = NewImageSize(Img.Height, Img.Width, relSize);
                dimensions = Img.Width.ToString() + " x " + Img.Height.ToString();
                using (System.Drawing.Image ImgThnail = new Bitmap(Img, ThumbNailSize.Width, ThumbNailSize.Height))
                {
                    ImgThnail.Save(ThumbnailPath, Img.RawFormat);
                    ImgThnail.Dispose();
                }
                Img.Dispose();
            }
            return dimensions;
        }
        private static Size NewImageSize(int OriginalHeight, int OriginalWidth, double FormatSize)
        {
            Size NewSize;
            double tempval;
            bool landscape;
   

Dig into the new co- and contravariance features coming in Visual Studio 2010. Binyam Kelile provides hands-on Visual Basic examples to explain how they provide more flexibility when working with generic interfaces and delegates.

Binyam Kelile

MSDN Magazine March 2010

This month Stephen Toub answers questions pertaining to the Windows Vista Restart Manager API and generic method compilation.

Stephen Toub

MSDN Magazine April 2007

A funny thing happened to templates on their way to the common language runtime (CLR)-they lost their {type} identity. This is analogous to what happens with macros under native programs. Just as the C/C++ compilers have no awareness of macro preprocessor expansions, the CLR has no awareness of template instantiations.

Stanley B. Lippman

MSDN Magazine December 2005

As I promised last time, in this month's column I'll walk through the process of defining and invoking a generic or template function under C++\CLI. A function template or a generic function begins with the template or generic keyword followed by its parameter list.

Stanley B. Lippman

MSDN Magazine October 2005

As I discussed in my last column, a param-eterized type that does more than simple storage and retrieval is constrained as to the acceptable types that may be safely bound to it (see Pure C++: CLR Generics Versus C++ Templates.

Stanley B. Lippman

MSDN Magazine August 2005

Visual Studio® 2005 brings the type parameter model of generic programming to the Microsoft® . NET Framework. Parameterized types are, of course, standard fare for C++ programmers. So, for those who are unfamiliar with them, I'll give a brief introduction to generic programming in my next few columns.

Stanley B. Lippman

MSDN Magazine April 2005

Ispeak at a lot of user groups and conferences where I field tech support questions. Recently, a conference attendee (I'll call him Adam) came up to me with a sheaf of printouts, along with the following question.

Ken Getz

MSDN Magazine September 2004

I need to cache System.Collection.Generic.List object with expiration time

var Root = from feed in feedhotel.Descendants(ota + "HotelContent")
                           where (feed.Attribute("HotelCode") != null)
                           select new xmlhotel()
                           {

....

....

    };

return Root.ToList();

Is it possible to cache Root.ToList() for some time....

Getting following error:A generic error occurred in GDI+.

Any help is appreciated.

Public Sub SaveImageFile(ByVal sourceImage As Bitmap, ByVal saveImagePath As [String], ByVal maxImageWidth As Integer)
            ' Resize if source image width is greater than the max:
            '--------------------------------

            If sourceImage.Width > maxImageWidth Then
                Dim bmp As Bitmap = TryCast(sourceImage, Bitmap)
                Dim newImageHeight As Integer = CInt(Math.Truncate(sourceImage.Height * (CSng(maxImageWidth) / CSng(sourceImage.Width))))
                Dim gr As Graphics = Graphics.FromImage(bmp)

                Dim bmpnew As New Bitmap(maxImageWidth, newImageHeight)
                gr.InterpolationMode = InterpolationMode.HighQualityBicubic

                gr.DrawImage(bmpnew, 0, 0, maxImageWidth, newImageHeight)
                gr.Dispose()
                bmp.Dispose()
                sourceImage.Dispose()

                'code to manipulate bmpNew goes here.

                bmpnew.Save(saveImagePath)
                '-------------------------

hello guys, i have this interface in java and would like to know how to do the same thing in .net (c#)

public interface State<S extends State<?,?>, O extends Operator> {

}

Hello,

I created a generic repository for a EF4 context in MyProj.Domain.

Now I have services with methods like FindById, FindByUsername that use the repositories.

My controllers use these services. 

Should I do the Mapping from Entities to View Models inside the services or in the controller?

The problem is for example, I might have UserEditViewModel and UserSignInViewModel.

In both cases I would need FindById.

So I might use UserService.FindById(id) in the controller and then map it to UserEditViewModel or UserSignInViewModel.

Or the other way around is to have two methods FindById in the service one returning UserEditViewModel and the other UserSignInViewModel.

I tend to do the mapping in the controller using AutoMapper so it is only a code line but I am not sure if this is the correct way.

Thanks,

Miguel