readd .net sdk documentation

docs/Guides/developing-with-firebolt/connecting-with-net-sdk.md

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+# Firebolt .NET SDK
+
+## Overview
+The Firebolt .NET SDK is a software development kit designed to facilitate the integration of Firebolt's high-performance database capabilities into .NET applications. This SDK provides developers with the tools and interfaces needed to interact with Firebolt databases efficiently, enabling effective data manipulation and query execution.
+
+## Installation
+Install the Firebolt .NET SDK by adding the NuGet package to your project. You can do this in several ways:
+
+### Via Package Manager Console
+```shell
+Install-Package FireboltNetSdk
+```
+
+### Via .NET CLI
+```shell
+dotnet add package FireboltNetSdk
+```
+
+### Via PackageReference
+Add the following line to your project file:
+```xml
+<PackageReference Include="FireboltNetSdk" Version="x.x.x" />
+```
+Make sure to replace `x.x.x` with the specific version you want to use.
+### Via **Visual Studio UI**
+`Tools` > `NuGet Package Manager` > `Manage NuGet Packages for Solution` and search for `Firebolt` 
+
+For more details and versioning information, please visit the [NuGet Gallery](https://www.nuget.org/packages/FireboltNetSdk/).
+
+## Quick Start
+Here's a simple example to get started with the Firebolt .NET SDK:
+
+```cs
+using FireboltNetSdk;
+
+public class Program
+{
+    public static async Task Main(string[] args)
+    {
+        // Name of your Firebolt account
+        string account = "my_firebolt_account";
+        // Client credentials, that you want to use to connect
+        string clientId = "my_client_id";
+        string clientSecret = "my_client_secret";
+        // Name of database and engine to connect to (Optional)
+        string database = "my_database_name";
+        string engine = "my_engine_name";
+
+        // Construct a connection string using defined parameter
+        string conn_string = $"account={account};clientid={clientId};clientsecret={clientSecret};database={database};engine={engine}";
+
+        // Create a new connection using generated connection string
+        using var conn = new FireboltConnection(conn_string);
+        // Open a connection
+        conn.Open();
+
+        // First you would need to create a command
+        var command = conn.CreateCommand();
+
+        // ... and set the SQL query
+        command.CommandText = "SELECT * FROM my_table";
+
+        // Execute a SQL query and get a DB reader
+        DbDataReader reader = command.ExecuteReader();
+
+        // Optionally you can check whether the result set has rows
+        Console.WriteLine($"Has rows: {reader.HasRows}");
+
+        // Close the connection after all operations are done
+        conn.Close();
+    }
+}
+```
+
+## Documentation
+For more detailed documentation, including API references and advanced usage, please refer to the [README](https://github.com/firebolt-db/firebolt-net-sdk/blob/main/README.md) file in the repository.
+
+## Support
+For support, issues, or contributions, please refer to the repository's issue tracker and contributing guidelines.
+
+## License
+This SDK is released under **Apache License 2.0**. Please see the [LICENSE](https://github.com/firebolt-db/firebolt-net-sdk/blob/main/LICENSE) file for more details.