Min(TSource) Method (IEnumerable(TSource), Func(TSource, Decimal))

Enumerable.Min<TSource> Method (IEnumerable<TSource>, Func<TSource, Decimal>)

Visual Studio 2010

Invokes a transform function on each element of a sequence and returns the minimum Decimal value.

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

Syntax

```public static decimal Min<TSource>(
this IEnumerable<TSource> source,
Func<TSource, decimal> selector
)

```

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Collections.Generic.IEnumerable<TSource>
A sequence of values to determine the minimum value of.
selector
Type: System.Func<TSource, Decimal>
A transform function to apply to each element.

Return Value

Type: System.Decimal
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<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Exceptions

ExceptionCondition
ArgumentNullException

source or selector is null.

InvalidOperationException

source contains no elements.

Remarks

The Min<TSource>(IEnumerable<TSource>, Func<TSource, Decimal>) method uses the Decimal implementation of IComparable<T> to compare values.

You can apply this method to a sequence of arbitrary values if you provide a function, selector, that projects the members of source into a numeric type, specifically Decimal.

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

Examples

The following code example demonstrates how to use Min<TSource>(IEnumerable<TSource>, Func<TSource, Int32>) to determine the minimum value in a sequence of projected values.

Note

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, change the body of the selector function.

```
class Pet
{
public string Name { get; set; }
public int Age { get; set; }
}

public static void MinEx4()
{
Pet[] pets = { new Pet { Name="Barley", Age=8 },
new Pet { Name="Boots", Age=4 },
new Pet { Name="Whiskers", Age=1 } };

int min = pets.Min(pet => pet.Age);

Console.WriteLine("The youngest animal is age {0}.", min);
}

/*
This code produces the following output:

The youngest animal is age 1.
*/

```

Version Information

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.