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Enumerable.Min<TSource> Method (IEnumerable<TSource>)

Returns the minimum value in a generic sequence.

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

public static TSource Min<TSource>(
	this IEnumerable<TSource> source

Type Parameters


The type of the elements of source.


Type: System.Collections.Generic.IEnumerable<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<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).


source is null.

If type TSource implements IComparable<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 null, this function returns null.

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<TSource>(IEnumerable<TSource>) to determine the minimum value in a sequence of IComparable<T> objects.

            /// <summary>
            /// This class implements IComparable in order to 
            /// be able to compare different Pet objects.
            /// </summary>
            class Pet : IComparable<Pet>
                public string Name { get; set; }
                public int Age { get; set; }

                /// <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>
                int IComparable<Pet>.CompareTo(Pet other)
                    if (other.Age > this.Age)
                        return -1;
                    else if (other.Age == this.Age)
                        return 0;
                        return 1;

            public static void MinEx3()
                Pet[] pets = { new Pet { Name="Barley", Age=8 },
                               new Pet { Name="Boots", Age=4 },
                               new Pet { Name="Whiskers", Age=1 } };

                Pet min = pets.Min();

                    "The 'minimum' animal is {0}.",

             This code produces the following output:

             The 'minimum' animal is Whiskers.

.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

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.