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GenericTypeParameterBuilder.MakeArrayType Method

Returns the type of a one-dimensional array whose element type is the generic type parameter.

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

public override Type MakeArrayType()

Return Value

Type: System.Type
A Type object that represents the type of a one-dimensional array whose element type is the generic type parameter.

The MakeArrayType method provides a way to generate array types 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");
    }
}

.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
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