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MoreEnumerableMinByTSource, TKey Method (IEnumerableTSource, FuncTSource, TKey, IComparerTKey)
Returns the minimal element of the given sequence, based on the given projection and the specified comparer for projected values.

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 2.0.0
Syntax
public static TSource MinBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> selector,
	IComparer<TKey> comparer
)

Parameters

source
Type: System.Collections.GenericIEnumerableTSource
Source sequence
selector
Type: SystemFuncTSource, TKey
Selector to use to pick the results to compare
comparer
Type: System.Collections.GenericIComparerTKey
Comparer to use to compare projected values

Type Parameters

TSource
Type of the source sequence
TKey
Type of the projected element

Return Value

Type: TSource
The minimal element, according to the projection.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. 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
ArgumentNullExceptionsource, selector or comparer is null
InvalidOperationExceptionsource is empty
Remarks
If more than one element has the minimal projected value, the first one encountered will be returned. This operator uses immediate execution, but only buffers a single result (the current minimal element).
See Also