Enumerable.Max Method (IEnumerable<(Of <(Nullable<(Of <(Double>)>)>)>))

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

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

Syntax

<ExtensionAttribute> _
Public Shared Function Max ( _
    source As IEnumerable(Of Nullable(Of Double)) _
) As Nullable(Of Double)
public static Nullable<double> Max(
    this IEnumerable<Nullable<double>> source
)

Parameters

Return Value

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

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<(Of <(Nullable<(Of <(Double>)>)>)>). When you use instance method syntax to call this method, omit the first parameter.

Exceptions

Exception Condition
ArgumentNullException

source is nullNothingnullptra null reference (Nothing in Visual Basic).

Remarks

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

If the source sequence is empty or contains only values that are nullNothingnullptra null reference (Nothing in Visual Basic), this function returns nullNothingnullptra null reference (Nothing in Visual Basic).

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

Examples

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

      ' 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.
      outputBlock.Text &= "The largest number is " & max & vbCrLf

      ' This code produces the following output:
      '
      ' The largest number is 1.5E+104
      double?[] doubles = { null, 1.5E+104, 9E+103, -2E+103 };

      double? max = doubles.Max();

      outputBlock.Text += String.Format("The largest number is {0}.", max) + "\n";

      /*
       This code produces the following output:

       The largest number is 1.5E+104.
      */

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Enumerable Class

Max Overload

System.Linq Namespace