ExactTarget is a cloud service provided by Salesforce
for running email campaign for email marketing. 
Here is a code to trigger emails in ExactTarget via its
web service.
Add reference of https://webservice.s7.exacttarget.com/etframework.wsdl
Change necessary values in below code and call the
method. That’s it.
static void TriggerEmail()
{
    SoapClient client = new SoapClient();
    client.ClientCredentials.UserName.UserName
= "xyz";
    client.ClientCredentials.UserName.Password
= "xyzpassword";
    //Create
a new subscriber - person email id
    Subscriber newSub = new Subscriber();
    newSub.EmailAddress = "abc@test.com";
    newSub.SubscriberKey = "abc@test.com";
    //Create
the subscriber attributes
    newSub.Attributes = new
ExactTargetClient.Attribute[4];
    //Attribute
- First Name 
    newSub.Attributes[0] = new
ExactTargetClient.Attribute();
    newSub.Attributes[0].Name = "First Name";
    newSub.Attributes[0].Value = "Enter your first Name Here";
    //Attribute
- Last Name 
    newSub.Attributes[1] = new
ExactTargetClient.Attribute();
    newSub.Attributes[1].Name = "Last Name";
    newSub.Attributes[1].Value = "Enter your Last Name Here";
    //Attribute
- Zip Code 
    newSub.Attributes[2] = new
ExactTargetClient.Attribute();
    newSub.Attributes[2].Name = "Zip Code";
    newSub.Attributes[2].Value = "110011";
    //Attribute
- State
    newSub.Attributes[3] = new
ExactTargetClient.Attribute();
    newSub.Attributes[3].Name = "State";
    newSub.Attributes[3].Value = "Johannesburg";
    //Create
a TriggerSend that uses an existing TriggerSendDefinition
    TriggeredSend ts = new TriggeredSend();
    ts.TriggeredSendDefinition = new TriggeredSendDefinition();
    //The external key assigned to the TriggerSendDeinition at
ExactTarget
    ts.TriggeredSendDefinition.CustomerKey = "101"; //Keep in config file
    ClientID clientID = new ClientID();
    clientID.ID = 1234567; //Keep in config
file
    ts.Client = clientID;
    //Instantiate
the CreateOptions object for the create call
    CreateOptions cOptionsTS = new CreateOptions();
    cOptionsTS.RequestType =
RequestType.Asynchronous;
    cOptionsTS.RequestTypeSpecified = true;
    ts.Subscribers = new Subscriber[] { newSub };
    try
    {
        //Create
the TriggeredSend
        string tsRequestID = "";
        string tsStatus = "";
        CreateResult[] tsResults =
client.Create(cOptionsTS, new APIObject[] { ts }, out tsRequestID, out tsStatus);
        TriggeredSendCreateResult tsCreateResults
= tsResults[0] as TriggeredSendCreateResult;
        Console.WriteLine("Status Code:
" + tsResults[0].StatusCode);
        Console.WriteLine("Status
Message: " +
tsResults[0].StatusMessage);
        Console.ReadLine();
        //Check
for Error
        if (tsStatus != "OK") { throw new Exception(); }
    }
    catch (Exception exCreate)
    {
        Console.WriteLine(exCreate.Message);
        Console.ReadLine();
    }
}
Please leave your comments or share this code if it’s
useful for you.