Nullable<T>.Equals Method
Indicates whether the current Nullable<T> object is equal to a specified object.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Parameters
- other
- Type: System.Object
An object.
Return Value
Type: System.Booleantrue if the other parameter is equal to the current Nullable<T> object; otherwise, false.
This table describes how equality is defined for the compared values:
Return Value | Description |
|---|---|
true | The HasValue property is false, and the other parameter is null. That is, two null values are equal by definition. -or- The HasValue property is true, and the value returned by the Value property is equal to the other parameter. |
false | The HasValue property for the current Nullable<T> structure is true, and the other parameter is null. -or- The HasValue property for the current Nullable<T> structure is false, and the other parameter is not null. -or- The HasValue property for the current Nullable<T> structure is true, and the value returned by the Value property is not equal to the other parameter. |
If the HasValue property of the current Nullable<T> structure is true, equality is determined by passing the other parameter to the Equals method of the underlying value of the current Nullable<T> structure.
The following code example determines whether an object and a Nullable<T> object are equal to the current Nullable<T> object.
// This code example demonstrates the Nullable<T>.Equals // methods. using System; class Sample { public static void Main() { int? nullInt1 = 100; int? nullInt2 = 200; object myObj; // Determine if two nullable of System.Int32 values are equal. // The nullable objects have different values. Console.Write("1) nullInt1 and nullInt2 "); if (nullInt1.Equals(nullInt2)) Console.Write("are"); else Console.Write("are not"); Console.WriteLine(" equal."); // Determine if a nullable of System.Int32 and an object // are equal. The object contains the boxed value of the // nullable object. myObj = (object)nullInt1; Console.Write("2) nullInt1 and myObj "); if (nullInt1.Equals(myObj)) Console.Write("are"); else Console.Write("are not"); Console.WriteLine(" equal."); } } /* This code example produces the following results: 1) nullInt1 and nullInt2 are not equal. 2) nullInt1 and myObj are equal. */
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
