Information.IsReference(Object) Method
Definition
Important
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Returns a Boolean value indicating whether an expression evaluates to a reference type.
public:
static bool IsReference(System::Object ^ Expression);public static bool IsReference (object? Expression);public static bool IsReference (object Expression);static member IsReference : obj -> boolPublic Function IsReference (Expression As Object) As BooleanParameters
- Expression
- Object
Required. Object expression.
Returns
Returns a Boolean value indicating whether an expression evaluates to a reference type.
Examples
This example uses the IsReference function to check if several variables refer to reference types.
Dim testArray(3) As Boolean
Dim testString As String = "Test string"
Dim testObject As Object = New Object()
Dim testNumber As Integer = 12
testArray(0) = IsReference(testArray)
testArray(1) = IsReference(testString)
testArray(2) = IsReference(testObject)
testArray(3) = IsReference(testNumber)
In the preceding example, the first three calls to IsReference return True. The last call returns False, because Integer is a value type, not a reference type.
Remarks
IsReference returns True if Expression represents a reference type, such as a class instance, a String type, or an array of any type; otherwise, it returns False.
A reference type contains a pointer to data stored elsewhere in memory. A value type contains its own data.
