Enumerable.Min(Of TSource) Method (IEnumerable(Of TSource))

Returns the minimum value in a generic sequence.

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

'Declaration
<ExtensionAttribute> _
Public Shared Function Min(Of TSource) ( _
	source As IEnumerable(Of TSource) _
) As TSource

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Collections.Generic.IEnumerable(Of TSource)
A sequence of values to determine the minimum value of.

Return Value

Type: TSource
The minimum 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 TSource). When you use instance method syntax to call this method, omit the first parameter.

ExceptionCondition
ArgumentNullException

source is Nothing.

If type TSource implements IComparable(Of T), this method uses that implementation to compare values. Otherwise, if type TSource implements IComparable, that implementation is used to compare values.

If TSource is a reference type and the source sequence is empty or contains only values that are Nothing, this function returns Nothing.

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

The following code example demonstrates how to use Min(Of TSource)(IEnumerable(Of TSource)) to determine the minimum value in a sequence of IComparable(Of T) objects.


   ' This class implements IComparable 
   ' and has a custom 'CompareTo' implementation.
   Class Pet
      Implements IComparable(Of Pet)

      Public Name As String
      Public Age As Integer

      ''' <summary>
      ''' Compares this Pet's age to another Pet's age.
      ''' </summary>
      ''' <param name="other">The Pet to compare this Pet to.</param>
      ''' <returns>-1 if this Pet's age is smaller,
      ''' 0 if the Pets' ages are equal,
      ''' or 1 if this Pet's age is greater.</returns>
      Function CompareTo(ByVal other As Pet) As Integer _
          Implements IComparable(Of Pet).CompareTo

         If (other.Age > Me.Age) Then
            Return -1
         ElseIf (other.Age = Me.Age) Then
            Return 0
         Else
            Return 1
         End If
      End Function
   End Class

   Sub MinEx3()
      ' Create an array of Pet objects.
      Dim pets() As Pet = {New Pet With {.Name = "Barley", .Age = 8}, _
                           New Pet With {.Name = "Boots", .Age = 4}, _
                           New Pet With {.Name = "Whiskers", .Age = 1}}

      ' Determine the "minimum" pet in the array,
      ' according to the custom CompareTo() implementation.
      Dim min As Pet = pets.Min()

      ' Display the result.
      outputBlock.Text &= "The 'minimum' pet is " & min.Name & vbCrLf
   End Sub

   ' This code produces the following output:
   '
   ' The 'minimum' pet is Whiskers



Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

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

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