Caution
Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Load which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkId=155570 for more information.
Loads the Assembly with a common object file format (COFF) based image containing an emitted Assembly. The raw bytes representing the symbols for the Assembly are also loaded.
public:
virtual System::Reflection::Assembly ^ Load(cli::array <System::Byte> ^ rawAssembly, cli::array <System::Byte> ^ rawSymbolStore, System::Security::Policy::Evidence ^ securityEvidence);public System.Reflection.Assembly Load(byte[] rawAssembly, byte[] rawSymbolStore, System.Security.Policy.Evidence securityEvidence);[System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Load which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkId=155570 for more information.")]
public System.Reflection.Assembly Load(byte[] rawAssembly, byte[] rawSymbolStore, System.Security.Policy.Evidence securityEvidence);abstract member Load : byte[] * byte[] * System.Security.Policy.Evidence -> System.Reflection.Assembly
override this.Load : byte[] * byte[] * System.Security.Policy.Evidence -> System.Reflection.Assembly[<System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Load which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkId=155570 for more information.")>]
abstract member Load : byte[] * byte[] * System.Security.Policy.Evidence -> System.Reflection.Assembly
override this.Load : byte[] * byte[] * System.Security.Policy.Evidence -> System.Reflection.AssemblyPublic Function Load (rawAssembly As Byte(), rawSymbolStore As Byte(), securityEvidence As Evidence) As AssemblyAn array of type byte that is a COFF-based image containing an emitted assembly.
An array of type byte containing the raw bytes representing the symbols for the assembly.
Evidence for loading the assembly.
ReturnsThe loaded assembly.
ImplementsrawAssembly is not a valid assembly for the currently loaded runtime.
The operation is attempted on an unloaded application domain.
An assembly or module was loaded twice with two different evidences.
securityEvidence is not null. When legacy CAS policy is not enabled, securityEvidence should be null.
The following sample demonstrates the use of loading a raw assembly.
For this code example to run, you must provide the fully qualified assembly name. For information about how to obtain the fully qualified assembly name, see Assembly Names.
using namespace System;
using namespace System::IO;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
void InstantiateMyType( AppDomain^ domain )
{
try
{
// You must supply a valid fully qualified assembly name here.
domain->CreateInstance( "Assembly text name, Version, Culture, PublicKeyToken", "MyType" );
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
}
// Loads the content of a file to a Byte array.
array<Byte>^ loadFile( String^ filename )
{
FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
array<Byte>^buffer = gcnew array<Byte>((int)fs->Length);
fs->Read( buffer, 0, buffer->Length );
fs->Close();
return buffer;
}
// Creates a dynamic assembly with symbol information
// and saves them to temp.dll and temp.pdb
void EmitAssembly( AppDomain^ domain )
{
AssemblyName^ assemblyName = gcnew AssemblyName;
assemblyName->Name = "MyAssembly";
AssemblyBuilder^ assemblyBuilder = domain->DefineDynamicAssembly( assemblyName, AssemblyBuilderAccess::Save );
ModuleBuilder^ moduleBuilder = assemblyBuilder->DefineDynamicModule( "MyModule", "temp.dll", true );
TypeBuilder^ typeBuilder = moduleBuilder->DefineType( "MyType", TypeAttributes::Public );
ConstructorBuilder^ constructorBuilder = typeBuilder->DefineConstructor( MethodAttributes::Public, CallingConventions::Standard, nullptr );
ILGenerator^ ilGenerator = constructorBuilder->GetILGenerator();
ilGenerator->EmitWriteLine( "MyType instantiated!" );
ilGenerator->Emit( OpCodes::Ret );
typeBuilder->CreateType();
assemblyBuilder->Save( "temp.dll" );
}
ref class Resolver
{
public:
static Assembly^ MyResolver( Object^ sender, ResolveEventArgs^ args )
{
AppDomain^ domain = dynamic_cast<AppDomain^>(sender);
// Once the files are generated, this call is
// actually no longer necessary.
EmitAssembly( domain );
array<Byte>^rawAssembly = loadFile( "temp.dll" );
array<Byte>^rawSymbolStore = loadFile( "temp.pdb" );
Assembly^ assembly = domain->Load( rawAssembly, rawSymbolStore );
return assembly;
}
};
int main()
{
AppDomain^ currentDomain = AppDomain::CurrentDomain;
InstantiateMyType( currentDomain ); // Failed!
currentDomain->AssemblyResolve += gcnew ResolveEventHandler( Resolver::MyResolver );
InstantiateMyType( currentDomain ); // OK!
}
using System;
using System.IO;
using System.Reflection;
using System.Reflection.Emit;
class LoadRawSnippet {
public static void Main() {
AppDomain currentDomain = AppDomain.CurrentDomain;
InstantiateMyType(currentDomain); // Failed!
currentDomain.AssemblyResolve += new ResolveEventHandler(MyResolver);
InstantiateMyType(currentDomain); // OK!
}
static void InstantiateMyType(AppDomain domain) {
try {
// You must supply a valid fully qualified assembly name here.
domain.CreateInstance("Assembly text name, Version, Culture, PublicKeyToken", "MyType");
} catch (Exception e) {
Console.WriteLine(e.Message);
}
}
// Loads the content of a file to a byte array.
static byte[] loadFile(string filename) {
FileStream fs = new FileStream(filename, FileMode.Open);
byte[] buffer = new byte[(int) fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
return buffer;
}
static Assembly MyResolver(object sender, ResolveEventArgs args) {
AppDomain domain = (AppDomain) sender;
// Once the files are generated, this call is
// actually no longer necessary.
EmitAssembly(domain);
byte[] rawAssembly = loadFile("temp.dll");
byte[] rawSymbolStore = loadFile("temp.pdb");
Assembly assembly = domain.Load(rawAssembly, rawSymbolStore);
return assembly;
}
// Creates a dynamic assembly with symbol information
// and saves them to temp.dll and temp.pdb
static void EmitAssembly(AppDomain domain) {
AssemblyName assemblyName = new AssemblyName();
assemblyName.Name = "MyAssembly";
AssemblyBuilder assemblyBuilder = domain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Save);
ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("MyModule", "temp.dll", true);
TypeBuilder typeBuilder = moduleBuilder.DefineType("MyType", TypeAttributes.Public);
ConstructorBuilder constructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, null);
ILGenerator ilGenerator = constructorBuilder.GetILGenerator();
ilGenerator.EmitWriteLine("MyType instantiated!");
ilGenerator.Emit(OpCodes.Ret);
typeBuilder.CreateType();
assemblyBuilder.Save("temp.dll");
}
}
open System
open System.IO
open System.Reflection
open System.Reflection.Emit
let instantiateMyType (domain: AppDomain) =
try
// You must supply a valid fully qualified assembly name here.
domain.CreateInstance("Assembly text name, Version, Culture, PublicKeyToken", "MyType")
|> ignore
with e ->
printfn $"{e.Message}"
// Loads the content of a file to a byte array.
let loadFile filename =
use fs = new FileStream(filename, FileMode.Open)
let buffer = Array.zeroCreate<byte> (int fs.Length)
fs.Read(buffer, 0, buffer.Length) |> ignore
fs.Close()
buffer
// Creates a dynamic assembly with symbol information
// and saves them to temp.dll and temp.pdb
let emitAssembly (domain: AppDomain) =
let assemblyName = AssemblyName()
assemblyName.Name <- "MyAssembly"
let assemblyBuilder = domain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Save)
let moduleBuilder = assemblyBuilder.DefineDynamicModule("MyModule", "temp.dll", true)
let typeBuilder = moduleBuilder.DefineType("MyType", TypeAttributes.Public)
let constructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, null)
let ilGenerator = constructorBuilder.GetILGenerator()
ilGenerator.EmitWriteLine "MyType instantiated!"
ilGenerator.Emit OpCodes.Ret
typeBuilder.CreateType() |> ignore
assemblyBuilder.Save "temp.dll"
let myResolver (sender: obj) (args: ResolveEventArgs) =
let domain = sender :?> AppDomain
// Once the files are generated, this call is
// actually no longer necessary.
emitAssembly domain
let rawAssembly = loadFile "temp.dll"
let rawSymbolStore = loadFile "temp.pdb"
domain.Load(rawAssembly, rawSymbolStore)
let currentDomain = AppDomain.CurrentDomain
instantiateMyType currentDomain // Failed!
currentDomain.add_AssemblyResolve (ResolveEventHandler myResolver)
instantiateMyType currentDomain // OK!
Imports System.IO
Imports System.Reflection
Imports System.Reflection.Emit
Module Test
Sub Main()
Dim currentDomain As AppDomain = AppDomain.CurrentDomain
InstantiateMyType(currentDomain) ' Failed!
AddHandler currentDomain.AssemblyResolve, AddressOf MyResolver
InstantiateMyType(currentDomain) ' OK!
End Sub
Sub InstantiateMyType(domain As AppDomain)
Try
' You must supply a valid fully qualified assembly name here.
domain.CreateInstance("Assembly text name, Version, Culture, PublicKeyToken", "MyType")
Catch e As Exception
Console.WriteLine(e.Message)
End Try
End Sub
' Loads the content of a file to a byte array.
Function loadFile(filename As String) As Byte()
Dim fs As New FileStream(filename, FileMode.Open)
Dim buffer(CInt(fs.Length - 1)) As Byte
fs.Read(buffer, 0, buffer.Length)
fs.Close()
Return buffer
End Function 'loadFile
Function MyResolver(sender As Object, args As ResolveEventArgs) As System.Reflection.Assembly
Dim domain As AppDomain = DirectCast(sender, AppDomain)
' Once the files are generated, this call is
' actually no longer necessary.
EmitAssembly(domain)
Dim rawAssembly As Byte() = loadFile("temp.dll")
Dim rawSymbolStore As Byte() = loadFile("temp.pdb")
Dim myAssembly As System.Reflection.Assembly = domain.Load(rawAssembly, rawSymbolStore)
Return myAssembly
End Function 'MyResolver
' Creates a dynamic assembly with symbol information
' and saves them to temp.dll and temp.pdb
Sub EmitAssembly(domain As AppDomain)
Dim assemblyName As New AssemblyName()
assemblyName.Name = "MyAssembly"
Dim assemblyBuilder As AssemblyBuilder = domain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Save)
Dim moduleBuilder As ModuleBuilder = assemblyBuilder.DefineDynamicModule("MyModule", "temp.dll", True)
Dim typeBuilder As TypeBuilder = moduleBuilder.DefineType("MyType", TypeAttributes.Public)
Dim constructorBuilder As ConstructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, Nothing)
Dim ilGenerator As ILGenerator = constructorBuilder.GetILGenerator()
ilGenerator.EmitWriteLine("MyType instantiated!")
ilGenerator.Emit(OpCodes.Ret)
typeBuilder.CreateType()
assemblyBuilder.Save("temp.dll")
End Sub
End Module 'Test
For information that is common to all overloads of this method, see the Load(AssemblyName) method overload.
Beginning with the .NET Framework 4, the trust level of an assembly that is loaded by using this method is the same as the trust level of the application domain.
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