C#

private void Form1_Load(object sender, EventArgs e)
        {            
            Document oReportDoc = new Document();
            Microsoft.Office.Interop.Word.Application oWord = new Microsoft.Office.Interop.Word.Application();
            oReportDoc = oWord.Documents.Open(@"C:\ChartTest.docx", ReadOnly: false);
            label2.Text = oReportDoc.InlineShapes.Count.ToString();
            int j = 1;
            foreach (Microsoft.Office.Interop.Word.InlineShape wshape in oReportDoc.InlineShapes)
            {
                try
                {
                    if (wshape.OLEFormat.ProgID.Equals("Excel.Sheet.8"))
                    {
                        if (wshape.HasChart == Microsoft.Office.Core.MsoTriState.msoTrue)
                        {
                            wshape.OLEFormat.Open();
                            Microsoft.Office.Interop.Excel.Workbook xlWorkBook = wshape.OLEFormat.Object;

                            if (xlWorkBook != null)
                            {
                                xlWorkBook.ActiveChart.HasTitle = true;
                                xlWorkBook.ActiveChart.ChartTitle.Text = "test" + j.ToString() + "!";
                                j++;
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    richTextBox1.Text = ex.Message;
                }
            }
        }