Check out example codes for "Int64". It will help you in understanding the concepts better.

Code Example 1

``````sbyte value1 = 124;
short value2 = 1618;
int value3 = Int32.MaxValue;

long number1 = value1;
long number2 = value2;
long number3 = value3;``````

Code Example 2

``````ulong ulNumber = 163245617943825;
try {
long number1 = (long) ulNumber;
Console.WriteLine(number1);
}
catch (OverflowException) {
Console.WriteLine("{0} is out of range of an Int64.", ulNumber);
}

double dbl2 = 35901.997;
try {
long number2 = (long) dbl2;
Console.WriteLine(number2);
}
catch (OverflowException) {
Console.WriteLine("{0} is out of range of an Int64.", dbl2);
}

BigInteger bigNumber = (BigInteger) 1.63201978555e30;
try {
long number3 = (long) bigNumber;
Console.WriteLine(number3);
}
catch (OverflowException) {
Console.WriteLine("{0} is out of range of an Int64.", bigNumber);
}
// The example displays the following output:
//    163245617943825
//    35902
//    1,632,019,785,549,999,969,612,091,883,520 is out of range of an Int64.``````

Code Example 3

``````decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
199.55m, 9214.16m, Decimal.MaxValue };
long result;

foreach (decimal value in values)
{
try {
result = Convert.ToInt64(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the Int64 type.",
value);
}
}
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the Int64 type.
//    Converted the Decimal value '-1034.23' to the Int64 value -1034.
//    Converted the Decimal value '-12' to the Int64 value -12.
//    Converted the Decimal value '0' to the Int64 value 0.
//    Converted the Decimal value '147' to the Int64 value 147.
//    Converted the Decimal value '199.55' to the Int64 value 200.
//    Converted the Decimal value '9214.16' to the Int64 value 9214.
//    79228162514264337593543950335 is outside the range of the Int64 type.``````

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