Driver/.NET: Add dedicated page

Author: amotl

docs/connect/dotnet.md

@@ -0,0 +1,58 @@
+(connect-dotnet)=
+
+# .NET
+
+:::{div} sd-text-muted
+Use Npgsql to connect to CrateDB from .NET applications.
+:::
+
+:::{rubric} About
+:::
+
+[Npgsql] is an open source ADO\.NET Data Provider for PostgreSQL, for programs
+written in C#, Visual Basic, and F#.
+
+:::{rubric} Synopsis
+:::
+
+```c#
+using Npgsql;
+
+var connString = "Host=localhost;Username=crate;Password=crate;Database=testdrive";
+
+var dataSourceBuilder = new NpgsqlDataSourceBuilder(connString);
+
+await using var dataSource = dataSourceBuilder.Build();
+await using var conn = await dataSource.OpenConnectionAsync();
+
+await using var cmd = new NpgsqlCommand("SELECT mountain, height FROM sys.summits ORDER BY height DESC LIMIT 3", conn);
+await using var reader = await cmd.ExecuteReaderAsync();
+while (await reader.ReadAsync())
+    Console.WriteLine(reader.GetString(0), reader.GetString(1));
+```
+
+## Examples
+
+:::{card}
+:link: https://github.com/crate/cratedb-examples/tree/main/by-language/csharp-npgsql
+:link-type: url
+{material-outlined}`play_arrow;2em`
+Connect to CrateDB and CrateDB Cloud using .NET (C#)
++++
+Demonstrates a basic example using Npgsql with CrateDB.
+:::
+
+:::{card}
+:link: https://github.com/crate/cratedb-examples/tree/main/by-language/csharp-efcore
+:link-type: url
+{material-outlined}`play_arrow;2em`
+Connect to CrateDB and CrateDB Cloud using the Npgsql Entity Framework
++++
+Demonstrates the Npgsql Entity Framework Core provider for PostgreSQL with CrateDB.
+:::
+
+[![C# Npgsql](https://github.com/crate/cratedb-examples/actions/workflows/lang-csharp-npgsql.yml/badge.svg)](https://github.com/crate/cratedb-examples/actions/workflows/lang-csharp-npgsql.yml)
+[![C# EF Core](https://github.com/crate/cratedb-examples/actions/workflows/lang-csharp-efcore.yml/badge.svg)](https://github.com/crate/cratedb-examples/actions/workflows/lang-csharp-efcore.yml)
+
+
+[Npgsql]: https://www.npgsql.org/

docs/connect/index.md

@@ -49,6 +49,20 @@ CrateDB drivers and adapters for supported programming languages, frameworks, an
 :margin: 4 4 0 0
 :padding: 0
 
+::::{grid-item-card} .NET
+:link: connect-dotnet
+:link-type: ref
+:link-alt: Connect to CrateDB using .NET
+:padding: 3
+:text-align: center
+:class-card: sd-pt-3
+:class-body: sd-fs-1
+:class-title: sd-fs-6
+```{image} https://images.seeklogo.com/logo-png/16/1/microsoft-net-logo-png_seeklogo-168315.png
+:width: 40px
+```
+::::
+
 ::::{grid-item-card} Java
 :link: connect-java
 :link-type: ref
@@ -182,6 +196,7 @@ application
 :maxdepth: 1
 :hidden:
 
+dotnet
 java
 javascript
 php