> For the complete documentation index, see [llms.txt](https://docs.mindee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mindee.com/v1/integration/dotnet-ocr-sdk/localized-products/dotnet-us-us-mail-ocr.md).
# US US Mail
The .NET SDK supports the Mindee V1 [US Mail API](https://platform.mindee.com/mindee/us_mail).
## Product Specifications
| Specification | Details |
| ------------------------------ | ------------------ |
| Endpoint Name | `us_mail` |
| Recommended Version | `v3.0` |
| Supports Polling/Webhooks | βοΈ Yes |
| Support Synchronous HTTP Calls | β No |
| Geography | πΊπΈ United States |
## Quick-Start
Using the [sample below](https://github.com/mindee/client-lib-test-data/blob/main/v1/products/us_mail/default_sample.jpg), we are going to illustrate how to extract the data that we want using the SDK.
### Sample Code
```csharp
using Mindee;
using Mindee.Input;
using Mindee.Product.Us.UsMail;
string apiKey = "my-api-key";
string filePath = "/path/to/the/file.ext";
// Construct a new client
MindeeClient mindeeClient = new MindeeClient(apiKey);
// Load an input source as a path string
// Other input types can be used, as mentioned in the docs
var inputSource = new LocalInputSource(filePath);
// Call the product asynchronously with auto-polling
var response = await mindeeClient
.EnqueueAndParseAsync(inputSource);
// Print a summary of all the predictions
System.Console.WriteLine(response.Document.ToString());
// Print only the document-level predictions
// System.Console.WriteLine(response.Document.Inference.Prediction.ToString());
```
### Sample Output (rST)
```rst
########
Document
########
:Mindee ID: f9c36f59-977d-4ddc-9f2d-31c294c456ac
:Filename: default_sample.jpg
Inference
#########
:Product: mindee/us_mail v3.0
:Rotation applied: Yes
Prediction
==========
:Sender Name: company zed
:Sender Address:
:City: Dallas
:Complete Address: 54321 Elm Street, Dallas, Texas 54321
:Postal Code: 54321
:State: TX
:Street: 54321 Elm Street
:Recipient Names: Jane Doe
:Recipient Addresses:
+-----------------+-------------------------------------+-------------------+-------------+------------------------+-------+---------------------------+-----------------+
| City | Complete Address | Is Address Change | Postal Code | Private Mailbox Number | State | Street | Unit |
+=================+=====================================+===================+=============+========================+=======+===========================+=================+
| Detroit | 1234 Market Street PMB 4321, Det... | False | 12345 | 4321 | MI | 1234 Market Street | |
+-----------------+-------------------------------------+-------------------+-------------+------------------------+-------+---------------------------+-----------------+
:Return to Sender: False
```
## Standard Fields
These fields are generic and used in several products.
### BaseField
Each prediction object contains a set of fields that inherit from the generic `BaseField` class. A typical `BaseField` object will have the following attributes:
* **Confidence** (`double?`): the confidence score of the field prediction.
* **BoundingBox** (`BoundingBox`): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document.
* **Polygon** (`Polygon`): contains the relative vertices coordinates (`Polygon` extends `List`) of a polygon containing the field in the image.
* **PageId** (`int?`): the ID of the page, always `null` when at document-level.
{% hint style="info" %}
A `Point` simply refers to a List of `double`.
{% endhint %}
Aside from the previous attributes, all basic fields have access to a custom `ToString` method that can be used to print their value as a string.
### StringField
The text field `StringField` extends `BaseField`, but also implements:
* **Value** (`string`): corresponds to the field value.
* **RawValue** (`string`): corresponds to the raw value as it appears on the document.
### BooleanField
The boolean field `BooleanField` extends BaseField, but also implements:
* **Value** (`bool?`): corresponds to the value of the field.
## Specific Fields
Fields which are specific to this product; they are not used in any other product.
### Recipient Addresses Field
The addresses of the recipients.
A `UsMailV3RecipientAddress` implements the following attributes:
* **City** (`string`): The city of the recipient's address.
* **Complete** (`string`): The complete address of the recipient.
* **IsAddressChange** (`bool?`): Indicates if the recipient's address is a change of address.
* **PostalCode** (`string`): The postal code of the recipient's address.
* **PrivateMailboxNumber** (`string`): The private mailbox number of the recipient's address.
* **State** (`string`): Second part of the ISO 3166-2 code, consisting of two letters indicating the US State.
* **Street** (`string`): The street of the recipient's address.
* **Unit** (`string`): The unit number of the recipient's address. Fields which are specific to this product; they are not used in any other product.
### Sender Address Field
The address of the sender.
A `UsMailV3SenderAddress` implements the following attributes:
* **City** (`string`): The city of the sender's address.
* **Complete** (`string`): The complete address of the sender.
* **PostalCode** (`string`): The postal code of the sender's address.
* **State** (`string`): Second part of the ISO 3166-2 code, consisting of two letters indicating the US State.
* **Street** (`string`): The street of the sender's address.
## Attributes
The following fields are extracted for US Mail V3:
### Return to Sender
**IsReturnToSender**: Whether the mailing is marked as return to sender.
```csharp
System.Console.WriteLine(result.Document.Inference.Prediction.IsReturnToSender.Value);
```
### Recipient Addresses
**RecipientAddresses**(List<[UsMailV3RecipientAddress](#recipient-addresses-field)>): The addresses of the recipients.
```csharp
foreach (var RecipientAddressesElem in result.Document.Inference.Prediction.RecipientAddresses)
{
System.Console.WriteLine(RecipientAddressesElem.Value);
}
```
### Recipient Names
**RecipientNames**: The names of the recipients.
```csharp
foreach (var RecipientNamesElem in result.Document.Inference.Prediction.RecipientNames)
{
System.Console.WriteLine(RecipientNamesElem.Value);
}
```
### Sender Address
**SenderAddress**([UsMailV3SenderAddress](#sender-address-field)): The address of the sender.
```csharp
System.Console.WriteLine(result.Document.Inference.Prediction.SenderAddress.Value);
```
### Sender Name
**SenderName**: The name of the sender.
```csharp
System.Console.WriteLine(result.Document.Inference.Prediction.SenderName.Value);
```
---
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