How many values is a subroutine capable of returning?

1. The signature of an indexer consists of the number and types of its formal parameters.
2. Indexers are similar to properties except that their accessors take parameters.
3. Accessors of interface indexers use modifiers.
4. The type of an indexer and the type of its parameters must be at least as accessible as the indexer itself.
5. An interface accessor contains a body.

interface IPerson
{ 
    String FirstName
    {
        get;
        set; 
    } 
}

class Employee : IPerson
{
    private String str; 
    public String FirstName
    {
        get
        { 
            return str;
        } 
        set
        { 
            str = value;
        } 
    } 
}

class Employee
{
    private String str;
    public String IPerson.FirstName
    { 
        get
        { 
            return str;
        } 
        set
        { 
            str = value;
        } 
    } 
}

class Employee : implements IPerson
{
    private String str; 
    public String FirstName
    { 
        get
        { 
            return str;
        } 
        set
        {
            str = value; 
        } 
    } 
}

1. Inheritance
2. Encapsulation
3. Templates
4. Containership
5. Polymorphism

int d; 
d = Convert.ToInt32( !(30 < 20) );

String s1 = "Nagpur";
String s2;
s2 = s1.Insert(6, "Mumbai"); 
Console.WriteLine(s2);