c#-2.0

How to call managed c# functions from unmanaged c++ Or use a project of mine that allows C# to create unmanaged exports. Those can be consumed as if they were written in a native language. I used COM interop first, but by now I switched to IJW (it just works), as it is a lot simpler. I have a wrapper C++/CLR DLL (compile with /clr). A simple example (using statics to make the calls easier): namespace MyClasses { public class MyClass { public static void DoSomething() { MessageBox.Show("Hello World"); } } } In the DLL I can reference namespaces as follows: using namespace MyClasses; And call it

I have below code in C# Dictionary<string, object> dObject = new Dictionary<string, object>(); I want to convert dObject to Dictionary<string, string> . How can I do this? Use the ToDictionary method: Dictionary<string, string> dString = dObject.ToDictionary(k => k.Key, k => k.Value.ToString()); Here you reuse the key from the original dictionary and you convert the values to strings using the ToString method. If your dictionary can contain null values you should add a null check before performing the ToString: Dictionary<string, string> dString = dObject.ToDictionary(k => k.Key, k => k.Value

I'm using a class that forwards events in C#. I was wondering if there's a way of doing it that requires less code overhead. Here's an example of what I have so far. class A { public event EventType EventA; } class B { A m_A = new A(); public event EventType EventB; public B() { m_A.EventA += OnEventA; } public void OnEventA() { if( EventB ) { EventB(); } } } Class A raises the original event. Class B forwards it as EventB (which is essentially the same event). Class A is hidden from other modules so they can't subscribe to EventA directly. What I'm trying to do is reduce the code overhead in

I could see a lot of very similar threads all around, but nothing seem to give me a solution which ought to be very basic. From my winforms application, I need to close a running instance of a word document (opened from the application itself). When I open the word document from the application, I keep a track of it in a list. Now how can I close the same doc? Here is what I tried: private bool CloseWord(string osPath) //here I pass the fully qualified path of the file { try { Word.Application app = (Word.Application)Marshal.GetActiveObject("Word.Application"); if (app == null) return true;

I have this extract of C# 2.0 source code: object valueFromDatabase; decimal result; valueFromDatabase = DBNull.Value; result = (decimal)(valueFromDatabase != DBNull.Value ? valueFromDatabase : 0); result = (valueFromDatabase != DBNull.Value ? (decimal)valueFromDatabase : (decimal)0); The first result evaluation throws an InvalidCastException whereas the second one does not. What is the difference between these two? Eric Lippert UPDATE: This question was the subject of my blog on May 27th 2010 . Thanks for the great question! There are a great many very confusing answers here. Let me try to