public void InsertMergeField()
{
//ExStart
//ExFor:DocumentBuilder.InsertField(string)
//ExId:DocumentBuilderInsertField
//ExSummary:Inserts a merge field into a document using DocumentBuilder.
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.InsertField(@"MERGEFIELD MyFieldName \* MERGEFORMAT");
//ExEnd
}