Dim dNumber As Double
dNumber = 23.15

Try
   ' Returns 23
   Dim iNumber As Integer
   iNumber = System.Convert.ToInt32(dNumber)
Catch exp As System.OverflowException
   System.Console.WriteLine("Overflow in double to int conversion.")
End Try

' Returns True
Dim bNumber As Boolean
bNumber = System.Convert.ToBoolean(dNumber)

' Returns "23.15"
Dim strNumber As String
strNumber = System.Convert.ToString(dNumber)

Try
   ' Returns '2'
   Dim chrNumber As Char
   chrNumber = System.Convert.ToChar(strNumber.Chars(1))
Catch exp As System.ArgumentNullException
   System.Console.WriteLine("String is null.")
Catch exp As System.FormatException
   System.Console.WriteLine("String length is greater than 1.")
End Try

' System.Console.ReadLine() returns a string and it
' must be converted.
Dim newInteger As Integer
newInteger = 0
Try
   System.Console.WriteLine("Enter an integer:")
   newInteger = System.Convert.ToInt32(System.Console.ReadLine())
Catch exp As System.ArgumentNullException
   System.Console.WriteLine("String is null.")
Catch exp As System.FormatException
   System.Console.WriteLine("String does not consist of an " + _
       "optional sign followed by a series of digits.")
Catch exp As System.OverflowException
   System.Console.WriteLine("Overflow in string to int conversion.")
End Try

System.Console.WriteLine("Your integer as a double is {0}", _
                         System.Convert.ToDouble(newInteger))

            double dNumber = 23.15;

            try {
                // Returns 23
                int    iNumber = System.Convert.ToInt32(dNumber);
            }
            catch (System.OverflowException) {
                System.Console.WriteLine(
                            "Overflow in double to int conversion.");
            }
            // Returns True
            bool   bNumber = System.Convert.ToBoolean(dNumber);
            
            // Returns "23.15"
            string strNumber = System.Convert.ToString(dNumber);

            try {
                // Returns '2'
                char chrNumber = System.Convert.ToChar(strNumber[0]);
            } 
            catch (System.ArgumentNullException) {
                System.Console.WriteLine("String is null");
            }
            catch (System.FormatException) {
                System.Console.WriteLine("String length is greater than 1.");
            }

            // System.Console.ReadLine() returns a string and it
            // must be converted.
            int newInteger = 0;
            try {
                System.Console.WriteLine("Enter an integer:");
                newInteger = System.Convert.ToInt32(
                                    System.Console.ReadLine());
            }
            catch (System.ArgumentNullException) {
                System.Console.WriteLine("String is null.");
            }
            catch (System.FormatException) {
                System.Console.WriteLine("String does not consist of an " +
                                "optional sign followed by a series of digits.");
            } 
            catch (System.OverflowException) {
                System.Console.WriteLine(
                "Overflow in string to int conversion.");
            }

            System.Console.WriteLine("Your integer as a double is {0}",
                                     System.Convert.ToDouble(newInteger));

Double dNumber = 23.15;

try
{
   // Returns 23
   Int32 iNumber = Convert::ToInt32( dNumber );
}
catch ( OverflowException^ ) 
{
   Console::WriteLine(
      "Overflow in Double to Int32 conversion" );
}
// Returns True
Boolean bNumber = Convert::ToBoolean( dNumber );

// Returns "23.15"
String^ strNumber = Convert::ToString( dNumber );

try
{
   // Returns '2'
   Char chrNumber = Convert::ToChar( strNumber->Substring( 0, 1 ) );
}
catch ( ArgumentNullException^ ) 
{
   Console::WriteLine(  "String is null" );
}
catch ( FormatException^ ) 
{
   Console::WriteLine(  "String length is greater than 1" );
}

// System::Console::ReadLine() returns a string and it
// must be converted.
Int32 newInteger = 0;
try
{
   Console::WriteLine(  "Enter an integer:" );
   newInteger = Convert::ToInt32( System::Console::ReadLine() );
}
catch ( ArgumentNullException^ ) 
{
   Console::WriteLine(  "String is null" );
}
catch ( FormatException^ ) 
{
   Console::WriteLine(  "String does not consist of an " +
      "optional sign followed by a series of digits" );
}
catch ( OverflowException^ ) 
{
   Console::WriteLine(  "Overflow in string to Int32 conversion" );
}

Console::WriteLine( "Your integer as a Double is {0}",
   Convert::ToDouble( newInteger ) );