AssemblyName.HashAlgorithm Property

Definition

Caution

AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.

Gets or sets the hash algorithm used by the assembly manifest.

public System.Configuration.Assemblies.AssemblyHashAlgorithm HashAlgorithm { get; set; }
[System.Obsolete("AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.", DiagnosticId="SYSLIB0037", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public System.Configuration.Assemblies.AssemblyHashAlgorithm HashAlgorithm { get; set; }

Property Value

The hash algorithm used by the assembly manifest.

Attributes

Examples

The following example emits a dynamic assembly and saves it to the current directory. When the assembly is created, the HashAlgorithm property is used to set the hash algorithm for the assembly manifest.


using System;
using System.Reflection;
using System.Threading;
using System.IO;
using System.Globalization;
using System.Reflection.Emit;
using System.Configuration.Assemblies;

public class AssemblyName_CodeBase
{
   public static void MakeAssembly(AssemblyName myAssemblyName, string fileName)
   {
      // Get the assembly builder from the application domain associated with the current thread.
      AssemblyBuilder myAssemblyBuilder = Thread.GetDomain().DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.RunAndSave);
      // Create a dynamic module in the assembly.
      ModuleBuilder myModuleBuilder = myAssemblyBuilder.DefineDynamicModule("MyModule", fileName);
      // Create a type in the module.
      TypeBuilder myTypeBuilder = myModuleBuilder.DefineType("MyType");
      // Create a method called 'Main'.
      MethodBuilder myMethodBuilder = myTypeBuilder.DefineMethod("Main", MethodAttributes.Public | MethodAttributes.HideBySig |
         MethodAttributes.Static, typeof(void), null);
      // Get the Intermediate Language generator for the method.
      ILGenerator myILGenerator = myMethodBuilder.GetILGenerator();
      // Use the utility method to generate the IL instructions that print a string to the console.
      myILGenerator.EmitWriteLine("Hello World!");
      // Generate the 'ret' IL instruction.
      myILGenerator.Emit(OpCodes.Ret);
      // End the creation of the type.
      myTypeBuilder.CreateType();
      // Set the method with name 'Main' as the entry point in the assembly.
      myAssemblyBuilder.SetEntryPoint(myMethodBuilder);
      myAssemblyBuilder.Save(fileName);
   }

   public static void Main()
   {

      // Create a dynamic assembly with name 'MyAssembly' and build version '1.0.0.2001'.
      AssemblyName myAssemblyName = new AssemblyName();
      // Set the codebase to the physical directory were the assembly resides.
      myAssemblyName.CodeBase = Directory.GetCurrentDirectory();
      // Set the culture information of the assembly to 'English-American'.
      myAssemblyName.CultureInfo = new CultureInfo("en-US");
      // Set the hash algorithm to 'SHA256'.
      myAssemblyName.HashAlgorithm = AssemblyHashAlgorithm.SHA256;
      myAssemblyName.Name = "MyAssembly";
      myAssemblyName.Version = new Version("1.0.0.2001");
      MakeAssembly(myAssemblyName, "MyAssembly.exe");

      // Get all the assemblies currently loaded in the application domain.
      Assembly[] myAssemblies = Thread.GetDomain().GetAssemblies();

      // Get the dynamic assembly named 'MyAssembly'.
      Assembly myAssembly = null;
      for(int i = 0; i < myAssemblies.Length; i++)
      {
         if(String.Compare(myAssemblies[i].GetName().Name, "MyAssembly") == 0)
            myAssembly = myAssemblies[i];
      }
      // Display the full assembly information to the console.
      if(myAssembly != null)
      {
         Console.WriteLine("\nDisplaying the full assembly name\n");
         Console.WriteLine(myAssembly.GetName().FullName);
      }
   }
}

Remarks

Viktigt

Starting with the .NET Framework 4, the HashAlgorithm property of an AssemblyName object that is returned by the Assembly.GetReferencedAssemblies method is AssemblyHashAlgorithm.None if there is no hash algorithm for the referenced assembly, or if the hash algorithm of the referenced assembly is not identified by the System.Configuration.Assemblies.AssemblyHashAlgorithm enumeration. In previous versions of the .NET Framework, the HashAlgorithm property returned AssemblyHashAlgorithm.SHA1 in this situation.

Applies to

Produkt Versioner (Föråldrad)
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6 (7, 8, 9)
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1