## WorkbookMetadata.CustomDocumentProperties property

Returns a [`DocumentProperty`](../../../aspose.cells.properties/documentproperty/) collection that represents all the custom document properties of the spreadsheet.

```csharp
public CustomDocumentPropertyCollection CustomDocumentProperties { get; }
```

### Examples

```csharp
using System;
using Aspose.Cells;
using Aspose.Cells.Metadata;

namespace AsposeCellsExamples
{
    public class WorkbookMetadataPropertyCustomDocumentPropertiesDemo
    {
        public static void Run()
        {
            // Source and destination paths
            string sourcePath = "example.xlsx";
            string destPath = "output.xlsx";

            // Create metadata options for document properties
            MetadataOptions options = new MetadataOptions(MetadataType.DocumentProperties);
            
            // Initialize workbook metadata
            WorkbookMetadata meta = new WorkbookMetadata(sourcePath, options);
            
            // Add custom document property
            meta.CustomDocumentProperties.Add("Author", "John Doe");
            
            // Save the workbook with metadata
            meta.Save(destPath);
            
            // Verify the custom property
            Workbook workbook = new Workbook(destPath);
            Console.WriteLine("Custom Property Value: " + 
                workbook.CustomDocumentProperties["Author"].Value);
        }
    }
}
```

### See Also

* class [CustomDocumentPropertyCollection](../../../aspose.cells.properties/customdocumentpropertycollection/)
* class [WorkbookMetadata](../)
* namespace [Aspose.Cells.Metadata](../../../aspose.cells.metadata/)
* assembly [Aspose.Cells](../../../)