Because all managed tasks derive from the Task base class, the first step when you create a custom task is to create a class library project in your preferred managed programming language and create a class that inherits from the base class. In this derived class you will override the methods and properties of the base class to implement your custom functionality.

In the same solution, create a second class library project for the custom user interface. A separate assembly for the user interface is recommended for ease of deployment because it allows you to update and redeploy the connection manager or its user interface independently.

Configure both projects to sign the assemblies that will be generated at build time by using a strong name key file.

Apply the DtsTaskAttribute attribute to the class that you have created to identify it as a task. This attribute provides design-time information such as the name, description, and task type of the task.

Use the UITypeName property to link the task to its custom user interface. To obtain the public key token that is required for this property, you an use sn.exe -t to display the public key token from the key pair (.snk) file that you intend to use to sign the user interface assembly.

using System;
using Microsoft.SqlServer.Dts.Runtime;
namespace Microsoft.SSIS.Samples
{
  [DtsTask
  (
   DisplayName = "MyTask",
   IconResource = "MyTask.MyTaskIcon.ico",
   UITypeName = "My Custom Task," +
   "Version=1.0.0.0," +
   "Culture = Neutral," +
   "PublicKeyToken = 12345abc6789de01",
   TaskType = "PackageMaintenance",
   TaskContact = "MyTask; company name; any other information",
   RequiredProductLevel = DTSProductLevel.None
   )]
  public class MyTask : Task
  {
    // Your code here.
  }
}

Imports System
Imports Microsoft.SqlServer.Dts.Runtime

<DtsTask(DisplayName:="MyTask", _
 IconResource:="MyTask.MyTaskIcon.ico", _
 UITypeName:="My Custom Task," & _
 "Version=1.0.0.0,Culture=Neutral," & _
 "PublicKeyToken=12345abc6789de01", _
 TaskType:="PackageMaintenance", _
 TaskContact:="MyTask; company name; any other information", _
 RequiredProductLevel:=DTSProductLevel.None)> _
Public Class MyTask
  Inherits Task

  ' Your code here.

End Class 'MyTask