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MakePointerType Method
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Type::MakePointerType Method

Returns a Type object that represents a pointer to the current type.

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

virtual Type^ MakePointerType()

Return Value

Type: System::Type
A Type object that represents a pointer to the current type.


The invoked method is not supported in the base class.


The current type is TypedReference.


The current type is a ByRef type. That is, Type::IsByRef returns true.

The MakePointerType method provides a way to generate pointer types for parameter lists.

Using the syntax of Microsoft intermediate language (MSIL), if the current Type object represents Int32, this method returns a Type object representing Int32*.

The following code example creates array, ref (ByRef in Visual Basic), and pointer types for the Test class.

using namespace System;
using namespace System::Reflection;

public ref class Example
   static void Main()
      // Create a Type object that represents a one-dimensional 
      // array of Example objects.
      Type^ t = Example::typeid->MakeArrayType();
      Console::WriteLine( L"\r\nArray of Example: {0}", t );

      // Create a Type object that represents a two-dimensional 
      // array of Example objects.
      t = Example::typeid->MakeArrayType( 2 );
      Console::WriteLine( L"\r\nTwo-dimensional array of Example: {0}", t );

      // Demonstrate an exception when an invalid array rank is 
      // specified. 
         t = Example::typeid->MakeArrayType(  -1 );
      catch ( Exception^ ex ) 
         Console::WriteLine( L"\r\n{0}", ex );

      // Create a Type object that represents a ByRef parameter 
      // of type Example.
      t = Example::typeid->MakeByRefType();
      Console::WriteLine( L"\r\nByRef Example: {0}", t );

      // Get a Type object representing the Example class, a 
      // MethodInfo representing the "Test" method, a ParameterInfo
      // representing the parameter of type Example, and finally 
      // a Type object representing the type of this ByRef parameter. 
      // Compare this Type object with the Type object created using 
      // MakeByRefType.
      Type^ t2 = Example::typeid;
      MethodInfo^ mi = t2->GetMethod( L"Test" );
      ParameterInfo^ pi = mi->GetParameters()[ 0 ];
      Type^ pt = pi->ParameterType;
      Console::WriteLine( L"Are the ByRef types equal? {0}", (t == pt) );

      // Create a Type object that represents a pointer to an 
      // Example object.
      t = Example::typeid->MakePointerType();
      Console::WriteLine( L"\r\nPointer to Example: {0}", t );

   // A sample method with a ByRef parameter. 
   void Test( interior_ptr<Example^> /*e*/ )

int main()

/* This example produces output similar to the following:

Array of Example: Example[]

Two-dimensional array of Example: Example[,]

System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.RuntimeType.MakeArrayType(Int32 rank) in c:\vbl\ndp\clr\src\BCL\System\RtType.cs:line 2999
   at Example.Main()

ByRef Example: Example&
Are the ByRef types equal? True

Pointer to Example: Example*


.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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