BigInteger.Equals Method (BigInteger)

Returns a value that indicates whether the current instance and a specified BigInteger object have the same value.

Namespace:  System.Numerics
Assembly:  System.Numerics (in System.Numerics.dll)

public bool Equals(
	BigInteger other


Type: System.Numerics.BigInteger
The object to compare.

Return Value

Type: System.Boolean
true if this BigInteger object and other have the same value; otherwise, false.



This method implements the IEquatable<T> interface and performs slightly better than Equals(Object) because it does not have to convert the other parameter to a BigInteger object.

To determine the relationship between the two BigInteger objects instead of just testing for equality, call the BigInteger.CompareTo(BigInteger) method.

The following example compares the approximate distance of several stars from Earth with the distance of Epsilon Indi from Earth to determine whether they are equal. The example uses each overload of the Equals method to test for equality.

const long LIGHT_YEAR = 5878625373183;

BigInteger altairDistance = 17 * LIGHT_YEAR;
BigInteger epsilonIndiDistance = 12 * LIGHT_YEAR;
BigInteger ursaeMajoris47Distance = 46 * LIGHT_YEAR;
long tauCetiDistance = 12 * LIGHT_YEAR;
ulong procyon2Distance = 12 * LIGHT_YEAR;
object wolf424ABDistance = 14 * LIGHT_YEAR;

outputBlock.Text += "Approx. equal distances from Epsilon Indi to:" + "\n";
outputBlock.Text += String.Format("   Altair: {0}",
                  epsilonIndiDistance.Equals(altairDistance)) + "\n";
outputBlock.Text += String.Format("   Ursae Majoris 47: {0}",
                  epsilonIndiDistance.Equals(ursaeMajoris47Distance)) + "\n";
outputBlock.Text += String.Format("   TauCeti: {0}",
                  epsilonIndiDistance.Equals(tauCetiDistance)) + "\n";
outputBlock.Text += String.Format("   Procyon 2: {0}",
                  epsilonIndiDistance.Equals(procyon2Distance)) + "\n";
outputBlock.Text += String.Format("   Wolf 424 AB: {0}",
                  epsilonIndiDistance.Equals(wolf424ABDistance)) + "\n";
// The example displays the following output:
//    Approx. equal distances from Epsilon Indi to:
//       Altair: False
//       Ursae Majoris 47: False
//       TauCeti: True
//       Procyon 2: True
//       Wolf 424 AB: False      


Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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