It’s easy to extract an application’s own icon in C#:
form.Icon = Icon.ExtractAssociatedIcon( Application.ExecutablePath );
The ExtractAssociatedIcon static method on the Icon class (in System.Drawing) extracts the associated icon from any file. By supplying the Application.ExecutablePath (in System.Windows.Forms), you extract the application’s own icon.
Sadly there is no built-in function in System.IO that will copy a folder and its contents. Following is a simple recursive algorithm that copies a folder, its sub-folders and files, creating the destination folder if needed. For simplicity, there is no error handling; an exception will throw if anything goes wrong, such as null or invalid paths or if the destination files already exist.
Here is the easiest way to read an entire text file into a C# string:
string s = System.IO.File.ReadAllText( path );
Be careful when returning C# arrays that are private members of an object, as it essentially makes the array contents public, since the client can easily change the array.
This article provides C# code for an empty enumerator. This generic class can be used to simulate enumeration over an empty collection of any type of objects. Here is the code:
When two overloads of a method in a generic class are the same (have identical type arguments) as a result of the generic type you specified, which method is called?
Given two generic classes:
public class Type1<T> {} public class Type2<T> {}
.NET allows you to specify a generic type as the type of another generic type:
Type1<Type2<int>> obj = new Type1<Type2<int>>();
It’s possible to provide multiple generic enumerators for a single class. The trick is that clients must specify which enumerator to use.
Here is one way to parse and sort a string with comma-delimited numbers:
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Cloning C# objects is one of those things that appears easy but is actually quite complicated with many “gotchas.” This article describes the most common ways to clone a C# object.
