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Amazon SQS supports the following logical data types: String, Number, and Binary. In addition, you can append your own custom labels. For more information, see Message Attribute Data Types.
Namespace: Amazon.SQS.Model
Assembly: AWSSDK.dll
Version: 0.0.3.0
public String DataType { get; set; }
This example shows how to send a message.
var client = new AmazonSQSClient();
var request = new SendMessageRequest
{
  DelaySeconds = (int)TimeSpan.FromSeconds(5).TotalSeconds,
  MessageAttributes = new Dictionary<string, MessageAttributeValue>
  {
    {
      "MyNameAttribute", new MessageAttributeValue 
        { DataType = "String", StringValue = "John Doe" }
    },
    {
      "MyAddressAttribute", new MessageAttributeValue 
        { DataType = "String", StringValue = "123 Main St." }
    },
    {
      "MyRegionAttribute", new MessageAttributeValue 
        { DataType = "String", StringValue = "Any Town, United States" }
    }
  },
  MessageBody = "John Doe customer information.",
  QueueUrl = "https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyTestQueue"
};
var response = client.SendMessage(request);
Console.WriteLine("For message ID '" + response.MessageId + "':");
Console.WriteLine("  MD5 of message attributes: " +
  response.MD5OfMessageAttributes);
Console.WriteLine("  MD5 of message body: " + response.MD5OfMessageBody);
      
      
.NET Framework: 
Supported in: 4.5, 4.0, 3.5
.NET for Windows Store apps: 
Supported in: Windows 8.1, Windows 8
.NET for Windows Phone: 
Supported in: Windows Phone 8.1, Windows Phone 8