Add ExecuteBatch() method documentation to .NET SDK reference

client-sdk-references/dotnet.mdx

@@ -47,7 +47,7 @@
 * **WPF**: Windows desktop applications
 
 **Current Limitations**:
 * Blazor (web) platforms are not yet supported.
 
 For more details, please refer to the package [README](https://github.com/powersync-ja/powersync-dotnet/tree/main?tab=readme-ov-file).
 
@@ -166,7 +166,7 @@
 
 public class MyConnector : IPowerSyncBackendConnector
 {
     private readonly HttpClient _httpClient;
 
     // User credentials for the current session
     public string UserId { get; private set; }
@@ -297,6 +297,38 @@
 );
 ```
 
+### Batch execution
+
+Use `ExecuteBatch` for bulk inserts or updates. This method executes the same SQL statement multiple times with different parameter sets, reusing the compiled statement for significantly better performance.
+
+```cs
+Task<NonQueryResult> ExecuteBatch(string query, object?[][]? parameters = null)
+```
+
+**When to use**: Use `ExecuteBatch` instead of multiple `Execute` calls when inserting or updating many rows at once. The performance improvement is substantial for larger datasets:
+
+| Entries | Individual inserts (ms) | Batch insert (ms) |
+|---------|-------------------------|-------------------|
+| 10      | 2                       | 2                 |
+| 1,000   | 110                     | 10                |
+| 10,000  | 842                     | 91                |
+| 100,000 | 10,801                  | 830               |
+
+**Example**:
+
+```cs
+// Insert multiple assets in a single batch operation
+var sql = "INSERT INTO assets (id, description, make) VALUES (?, ?, ?)";
+object?[][] parameters = [
+    [Guid.NewGuid().ToString(), "Asset 1", "Make A"],
+    [Guid.NewGuid().ToString(), "Asset 2", "Make B"],
+    [Guid.NewGuid().ToString(), "Asset 3", "Make C"]
+];
+
+var result = await db.ExecuteBatch(sql, parameters);
+Console.WriteLine($"Rows affected: {result.RowsAffected}");
+```
+
 ## Access PowerSync connection status information
 
 Use [SyncStatus](https://github.com/powersync-ja/powersync-dotnet/blob/main/PowerSync/PowerSync.Common/DB/Crud/SyncStatus.cs) and access [RunListener](https://github.com/powersync-ja/powersync-dotnet/blob/main/PowerSync/PowerSync.Common/Client/PowerSyncDatabase.cs) to listen for status changes to your PowerSync instance.