> ## Documentation Index
> Fetch the complete documentation index at: https://razorpay-60c89f9a-mintlify-audit-missing-sections-1778528421.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Prerequisites

> Install the Razorpay .NET SDK and integrate it with your .NET-based website to accept payments, initiate refunds and do much more.

* **.NET Changelog**: Discover new features, updates and deprecations related to the Razorpay .NET SDK (since Jan 2024).

  * **Troubleshooting & FAQs**: Troubleshoot common error scenarios and find answers to frequently asked questions about Razorpay .NET SDK.

Install the Razorpay .NET SDK and integrate it with your .NET-based website to accept payments, initiate refunds and do much more.

## Dependencies

You must use .NET v4.5 or higher with TLS version 1.2. Using it with a lower .NET version will lead to [errors](/payments/server-integration/dot-net/troubleshooting-faqs). Know more about the [latest .NET versions](https://versionsof.net/framework/).

## .NET Client API

The .NET Client API follows the below practices:

* Namespaced under `Razorpay.Api`.
* The .NET client throws exceptions instead of returning errors.
* Options are passed as a Dictionary instead of multiple arguments, wherever possible.
* All requests and responses are communicated over JSON.

## Installation

Install Razorpay using either:

To install the SDK using NuGet Package Manager:

1. [Download the latest source code zip file](https://github.com/razorpay/razorpay-dot-net/releases) from the releases section on GitHub.
2. [Download the NuGet Package Manager](https://marketplace.visualstudio.com/items?itemName=NuGetTeam.NuGetPackageManager) and install it.

<Info>
  **Handy Tips**

  The NuGet Package Manager only supports .NET 4.0 and higher. Ensure that you have the appropriate version of .NET installed.

  3. Run the following command on the NuGet Package Manager:

     ```
     Install-Package Razorpay -Version {version_number}
     ```
</Info>

<Info>
  **Handy Tips**

  You must have [.NET Core CLI](https://dotnet.microsoft.com/download) installed on your system to use this method.

  To install the SDK from the command prompt:

  1. [Download the latest source code file](https://www.nuget.org/packages/Razorpay) from the nuget.org.
  2. Run the following command:
     ```
     dotnet add package Razorpay --version {version_number}
     ```
</Info>

<Info>
  **Handy Tips**

  In case the last command fails with `invalid cert received from server`, run the following commands:

  ```bash: Certification Manager commands theme={null}
  yes | certmgr -ssl -m https://go.microsoft.com
  yes | certmgr -ssl -m https://nugetgallery.blob.core.windows.net
  yes | certmgr -ssl -m https://myget.org
  yes | certmgr -ssl -m https://nuget.org
  mozroots --import --sync --quiet
  ```

  * **Payment Gateway**: Integrate with Razorpay Payment Gateway.

  * **API Sample Codes**: Integrate using API sample codes.
</Info>

## Support

* **Queries**: If you have queries, [contact support](https://razorpay.com/support/).

* **Feature Request:** If you have a feature request, raise an issue on [GitHub](https://github.com/razorpay/razorpay-dot-net/issues/new).

### Related Information

[Address Verification System](/payments/international-payments/address-verification-system)