c#-2.0

Okay, so i've created my c# application, created an installer for it and have it working installed on my machine. The problem is, when the user opens the application exe twice, there will be two instances of the application running. I only ever want one instance of the application to be running at any time, how do I go about doing this? Thanks for your help, The common technique for this is to create a named Mutex and check for its presence on application start. See this or this . Code from DDJ: class App : Form { Mutex mutex; App() { Text = "Single Instance!"; mutex = new Mutex(false, "SINGLE

I have List List<MyType> , my type contains Age and RandomID Now I want to find the maximum age from this list. What is the simplest and most efficient way? Jon Skeet Okay, so if you don't have LINQ, you could hard-code it: public int FindMaxAge(List<MyType> list) { if (list.Count == 0) { throw new InvalidOperationException("Empty list"); } int maxAge = int.MinValue; foreach (MyType type in list) { if (type.Age > maxAge) { maxAge = type.Age; } } return maxAge; } Or you could write a more general version, reusable across lots of list types: public int FindMaxValue<T>(List<T> list, Converter<T,

I have a set of C# (v2) apps and I am struggling with registry virtualization in Win7 (and to a lesser extent Vista). I have a shared registry configuration area that my applications need to access in HKLM\Software\Company... Prior to Vista, everything was just written to and read from that location as needed. The code appropriately detected failures to write to that registry key and would fall back appropriately (writing to HKCU instead and notifying the user that the settings they had applied would only affect the current user). In Vista, registry virtualization broke all of this because the

I failed to convert List<string> to List<myEnumType> . I don't know why? string Val = it.Current.Value.ToString(); // works well here List<myEnumType> ValList = new List<myEnumType>(Val.Split(',')); // compile failed Of cause myEnumType type defined as string enum type as this, public enum myEnumType { strVal_1, strVal_2, strVal_3, } Is there anything wrong? Appreciated for you replies. EDIT: Oops, I missed the C# 2 tag as well. I'll leave the other options available below, but: In C# 2, you're probably best using List<T>.ConvertAll : List<MyEnumType> enumList = stringList.ConvertAll(delegate

I want to compress a file and a directory in C#. I found some solution in Internet but they are so complex and I couldn't run them in my project. Can anybody suggest me a clear and effective solution? You could use GZipStream in the System.IO.Compression namespace .NET 2.0. public static void CompressFile(string path) { FileStream sourceFile = File.OpenRead(path); FileStream destinationFile = File.Create(path + ".gz"); byte[] buffer = new byte[sourceFile.Length]; sourceFile.Read(buffer, 0, buffer.Length); using (GZipStream output = new GZipStream(destinationFile, CompressionMode.Compress)) {

I want to make a very simple event bus which will allow any client to subscribe to a particular type of event and when any publisher pushes an event on the bus using EventBus.PushEvent() method only the clients that subscribed to that particular event type will get the event. I am using C# and .NET 2.0. Tiny Messenger is a good choice, I've been using it in a live project for 2.5 years now. Some code examples from the Wiki (link below): Publishing messageHub.Publish(new MyMessage()); Subscribing messageHub.Subscribe<MyMessage>((m) => { MessageBox.Show("Message Received!"); }); messageHub