The constructor to be invoked must be accessible.

Note:

Starting with the .NET Framework version 2.0 Service Pack 1, this method can be used to access nonpublic types if the caller has been granted ReflectionPermission with the ReflectionPermissionFlag..::.RestrictedMemberAccess flag and if the grant set of the assembly that contains the nonpublic types is restricted to the caller’s grant set, or to a subset thereof. (See Security Considerations for Reflection.) To use this functionality, your application should target the .NET Framework version 3.5. For more information, see .NET Framework 3.5 Architecture.

The following code example demonstrates how to call the CreateInstance(Type) method. This code example is part of a larger example provided for the Activator class.

' Create an instance of the StringBuilder type using 
' Activator.CreateInstance.
Dim o As Object = Activator.CreateInstance(GetType(StringBuilder))

' Append a string into the StringBuilder object and display the 
' StringBuilder.
Dim sb As StringBuilder = CType(o, StringBuilder)
sb.Append("Hello, there.")
Console.WriteLine(sb)

// Create an instance of the StringBuilder type using 
// Activator.CreateInstance.
Object o = Activator.CreateInstance(typeof(StringBuilder));

// Append a string into the StringBuilder object and display the 
// StringBuilder.
StringBuilder sb = (StringBuilder) o;
sb.Append("Hello, there.");
Console.WriteLine(sb);

// Create an instance of the StringBuilder type using 
// Activator.CreateInstance.
Object^ o = Activator::CreateInstance(StringBuilder::typeid);

// Append a string into the StringBuilder object and display the 
// StringBuilder.
StringBuilder^ sb = (StringBuilder^) o;
sb->Append("Hello, there.");
Console::WriteLine(sb);

• SecurityPermission 

  for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag..::.UnmanagedCode

• ReflectionPermission 

  for accessing a nonpublic type when the grant set of the nonpublic type is restricted to the caller's grant set, or to a subset thereof. Associated enumeration: ReflectionPermissionFlag..::.RestrictedMemberAccess

• ReflectionPermission 

  for accessing nonpublic types regardless of their grant sets. Associated enumeration: ReflectionPermissionFlag..::.MemberAccess

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

.NET Framework

.NET Compact Framework

XNA Framework

Reference