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Activator.CreateInstance<T> Method

Creates an instance of the type designated by the specified generic type parameter, using the parameterless constructor.

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

public static T CreateInstance<T>()

Type Parameters

T

The type to create.

Return Value

Type: T
A reference to the newly created object.

ExceptionCondition
MissingMethodException

The type that is specified for T does not have a parameterless constructor.

The CreateInstance generic method is used by compilers to implement the instantiation of types specified by type parameters. For example, in the following generic method, the implementation of new T() (gcnew T() in C++) uses the CreateInstance generic method.

public static T Factory<T>() where T:new() 
{
    return new T();   
}

In general, there is no use for the CreateInstance in application code, because the type must be known at compile time. If the type is known at compile time, normal instantiation syntax can be used (new operator in C#, New in Visual Basic, gcnew in C++).

There are no overloads of the CreateInstance generic method that take argument lists, because the non-generic overloads of CreateInstance already provide late-bound constructor resolution.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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