Enumerable.Max Method (IEnumerable(Of Nullable(Of Int32)))


Returns the maximum value in a sequence of nullable Int32 values.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

Public Shared Function Max (
	source As IEnumerable(Of Nullable(Of Integer))
) As Nullable(Of Integer)


Type: System.Collections.Generic.IEnumerable(Of Nullable(Of Int32))

A sequence of nullable Int32 values to determine the maximum value of.

Return Value

Type: System.Nullable(Of Int32)

A value of type Nullable<Int32> in C# or Nullable(Of Int32) in Visual Basic that corresponds to the maximum value in the sequence. 

Exception Condition

source is null.

The Max(IEnumerable(Of Nullable(Of Int32))) method uses the Int32 implementation of IComparable(Of T) to compare values.

If the source sequence is empty or contains only values that are null, this function returns null.

In Visual Basic query expression syntax, an Aggregate Into Max() clause translates to an invocation of Max.

The following code example demonstrates how to use Max(IEnumerable(Of Nullable(Of Double))) to determine the maximum value in a sequence.


This code example uses an overload of this overloaded method that is different from the specific overload that this topic describes. To extend the example to this topic, substitute the elements of the source sequence with elements of the appropriate numerical type.

' Create an array of Nullable Double values.
Dim doubles() As Nullable(Of Double) =
{Nothing, 1.5E+104, 9.0E+103, -2.0E+103}

' Determine the maximum value in the array.
Dim max As Nullable(Of Double) = doubles.Max()

' Display the result.
MsgBox("The largest number is " & max)

' This code produces the following output:
' The largest number is 1.5E+104

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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