What is a multicast delegate?

It is a delegate that points to and eventually fires off several methods.


How does one compare strings in C#?

In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings' values. That will still work, but the C# compiler now automatically compares the values instead of the references when the == or != operators are used on string types. If you actually do want to compare references, it can be done as follows: if ((object) str1 == (object) str2) { ... } Here's an example showing how string compares

work: using System;

public class StringTest

{

public static void Main(string[] args)

{

Object nullObj = null;

Object realObj = new StringTest();

int i = 10;

Console.WriteLine("Null Object is [" + nullObj + "]n" +

"Real Object is [" + realObj + "]n" +

"i is [" + i + "]n");

// Show string equality operators

string str1 = "foo";

string str2 = "bar";

string str3 = "bar";

Console.WriteLine("{0} == {1} ? {2}", str1, str2, str1 == str2 );

Console.WriteLine("{0} == {1} ? {2}", str2, str3,str2 == str3 );

}

}

Output: Null Object is []

Real Object is [StringTest]

i is [10]

foo == bar ? False

bar == bar ? True