Export (0) Print
Expand All

GenericTypeParameterBuilder.MakeByRefType Method

Returns a Type object that represents the current generic type parameter when passed as a reference parameter.

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

public override Type MakeByRefType ()
public Type MakeByRefType ()
public override function MakeByRefType () : Type
Not applicable.

Return Value

A Type object that represents the current generic type parameter when passed as a reference parameter.

The MakeByRefType method provides a way to generate ref types (ByRef in Visual Basic) for parameter lists.

The following code example creates a dynamic module, an abstract generic type named Sample with one type parameter, T, and an abstract method named TestMethod. TestMethod takes a ref parameter (ByRef in Visual Basic) of type T, a pointer to type T, and an array of T. This method returns a two-dimensional array of T. The code example saves the dynamic module to disk, so you can examine it using the MSIL Disassembler (Ildasm.exe).

using System;
using System.Reflection;
using System.Reflection.Emit;
using Microsoft.VisualBasic;

public class Example
{
    public static void Main()
    {
        // Define a dynamic assembly to contain the sample type. The
        // assembly will not be run, but only saved to disk, so
        // AssemblyBuilderAccess.Save is specified.
        //
        AppDomain myDomain = AppDomain.CurrentDomain;
        AssemblyName myAsmName = new 
            AssemblyName("MakeXxxGenericTypeParameterExample");
        AssemblyBuilder myAssembly = myDomain.DefineDynamicAssembly(
            myAsmName, AssemblyBuilderAccess.Save);

        // An assembly is made up of executable modules. For a single-
        // module assembly, the module name and file name are the same 
        // as the assembly name. 
        //
        ModuleBuilder myModule = myAssembly.DefineDynamicModule(
            myAsmName.Name, myAsmName.Name + ".dll");

        // Define the sample type.
        TypeBuilder myType = myModule.DefineType("Sample", 
            TypeAttributes.Public | TypeAttributes.Abstract);

        // Make the sample type a generic type, by defining a type
        // parameter T. All type parameters are defined at the same
        // time, by passing an array containing the type parameter
        // names. 
        string[] typeParamNames = {"T"};
        GenericTypeParameterBuilder[] typeParams = 
            myType.DefineGenericParameters(typeParamNames);

        // Define a method that takes a ByRef argument of type T, a
        // pointer to type T, and one-dimensional array of type T. The
        // method returns a two-dimensional array of type T.
        //
        // To create this method, you need Type objects that represent the
        // parameter types and the return type. Use the MakeByRefType, 
        // MakePointerType, and MakeArrayType methods to create the Type
        // objects, using the generic type parameter T.
        //
        Type byRefType = typeParams[0].MakeByRefType();
        Type pointerType = typeParams[0].MakePointerType();
        Type arrayType = typeParams[0].MakeArrayType();
        Type twoDimArrayType = typeParams[0].MakeArrayType(2);

        // Create the array of parameter types.
        Type[] parameterTypes = {byRefType, pointerType, arrayType};

        // Define the abstract Test method. After you have compiled
        // and run this example code, you can use ildasm.exe to open
        // MakeXxxGenericTypeParameterExample.dll, examine the Sample
        // type, and verify the parameter types and return type of
        // the TestMethod method.
        //
        MethodBuilder myMethodBuilder = myType.DefineMethod(
            "TestMethod", 
            MethodAttributes.Abstract | MethodAttributes.Virtual
            | MethodAttributes.Public, 
            twoDimArrayType, 
            parameterTypes);

        // Create the type and save the assembly. For a single-file 
        // assembly, there is only one module to store the manifest 
        // information in.
        //
        myType.CreateType();
        myAssembly.Save(myAsmName.Name + ".dll");
    }
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

Community Additions

ADD
Show:
© 2014 Microsoft