Code to Create a Form in Word using C#. Further details are available here: https://kb.aspose.com/words/net/how-to-create-a-form-in-word-using-csharp/

How to Create a Form in Word using C#.cs

using Aspose.Words;
using Aspose.Words.Fields;

namespace HowToCreateAFormInWordUsingCSharp
{
    class Program
    {
        static void Main(string[] args) // Main function for how to create a form in Word using CSharp
        {
            //Initialize license
            Aspose.Words.License lic = new Aspose.Words.License();
            lic.SetLicense("Aspose.Total.lic");

            // Create a document
            Document docForm = new Document();

            // Create a DocumentBuilder object
            DocumentBuilder builderForm = new DocumentBuilder(docForm);

            // Insert text input
            builderForm.InsertTextInput("TextInputControl", TextFormFieldType.Regular, "", "Enter text here", 0);
            builderForm.InsertBreak(BreakType.LineBreak);

            // Insert checkbox
            builderForm.InsertCheckBox("CheckBoxControl", true, true, 0);

            // Save the document
            docForm.Save("output.docx");

            System.Console.WriteLine("Done");
        }
    }
}