Add C# examples to SELECT documentation

Author: LuceCarter

docs/40-CRUD/2-SELECT.mdx

@@ -88,7 +88,7 @@ Here:
 
         await cursor.forEach((b) => {
             console.log(b);
-        });      
+        });
         ```
       </div>
 
@@ -100,6 +100,14 @@ Here:
         ```
       </div>
     </TabItem>
+     <TabItem value="csharp" label="C#">
+      <div>
+        ```csharp
+        var projection = Builders<Book>.Projection.Include(b => b.Title).Exclude(b => b.Id);
+        booksCollection.Find(b => true).Project<Book>(projection);
+        ```
+      </div>
+    </TabItem>
   </Tabs>
 </details>
 
@@ -126,5 +134,13 @@ Here:
           ```
         </div>
     </TabItem>
+     <TabItem value="csharp" label="C#">
+      <div>
+        ```csharp
+        var projection = Builders<Book>.Projection.Exclude(b => b.Authors).Exclude(b => b.Id);
+        booksCollection.Find(b => true).Project<Book>(projection);
+        ```
+      </div>
+    </TabItem>
   </Tabs>
 </details>