[Public] Properly Initializing RenderingOptions in IronPDF

When working with IronPDF, some users may attempt to initialize the RenderingOptions property of ChromePdfRenderer directly within the object initializer, like so:

var Renderer = new IronPdf.ChromePdfRenderer
{
    RenderingOptions = GetRendererOptions()
};

private ChromePdfRenderOptions GetRendererOptions()
{
    var rendererOptions = new ChromePdfRenderOptions()
    {
        CssMediaType = IronPdf.Rendering.PdfCssMediaType.Screen,
        PrintHtmlBackgrounds = true,
        FitToPaperMode = IronPdf.Engines.Chrome.FitToPaperModes.AutomaticFit
    };
    return rendererOptions;
}

However, this approach may lead to a runtime exception:

IronSoftware.Exceptions.IronSoftwareDeploymentException
HResult=0x80131500
Message=Error while deploying IronPdf Chrome renderer: 'The parameter is incorrect.'

Why This Happens

Based on observed behavior, it appears that calling the GetRendererOptions() method directly within the initializer of the ChromePdfRenderer object may cause an interruption or unexpected behavior during the initialization process.

This may be due to timing issues, or the fact that the object being passed is not fully ready when the renderer is being constructed.

Recommended Solutions

To resolve this issue, consider one of the following approaches:

✅ Option 1: Make GetRendererOptions() a Static Method

If GetRendererOptions() does not rely on any instance-specific state, you can make it a static method. This allows it to be called safely within the initialization block:

private static ChromePdfRenderOptions GetRendererOptions()
{
    return new ChromePdfRenderOptions
    {
        CssMediaType = IronPdf.Rendering.PdfCssMediaType.Screen,
        PrintHtmlBackgrounds = true,
        FitToPaperMode = IronPdf.Engines.Chrome.FitToPaperModes.AutomaticFit
    };
}

✅ Option 2: Separate the Method Call Before Initialization

Alternatively, call GetRendererOptions() separately before creating the ChromePdfRenderer instance. This ensures the options are fully prepared before assignment:

var options = GetRendererOptions();

var Renderer = new IronPdf.ChromePdfRenderer
{
    RenderingOptions = options
};

This approach avoids potential conflicts or timing issues and results in cleaner, more maintainable code.

Conclusion

While it might seem convenient to initialize everything in a single block, doing so with methods that return complex objects can sometimes introduce unexpected errors. Separating initialization logic or using static methods can help ensure your PDF rendering setup runs smoothly.