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List<T>::ForEach Method

.NET Framework 4.5

Performs the specified action on each element of the List<T>.

Namespace: System.Collections.Generic
Assembly: mscorlib (in mscorlib.dll)

public:
void ForEach(
	Action<T>^ action
)

Parameters

action: Type: System::Action<T>
The Action<T> delegate to perform on each element of the List<T>.

Exceptions

Exception	Condition
ArgumentNullException	action is nullptr.

Remarks

The Action<T> is a delegate to a method that performs an action on the object passed to it. The elements of the current List<T> are individually passed to the Action<T> delegate.

This method is an O(n) operation, where n is Count.

Modifying the underlying collection in the body of the Action<T> delegate is not supported and causes undefined behavior.

Examples

The following example demonstrates the use of the Action<T> delegate to print the contents of a List<T> object. In this example the Print method is used to display the contents of the list to the console.

Note
In addition to displaying the contents using the Print method, the C# example demonstrates the use of anonymous methods to display the results to the console.

C++

No code example is currently available or this language may not be supported.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Reference

List<T> Class

System.Collections.Generic Namespace

Action<T>

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