.NET (Core and Framework)

<?xml version="1.0" encoding="utf-8"?>
<?mso-application progid="Excel.Sheet"?>
<ss:Workbook xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">
  <ss:Styles>
    <ss:Style ss:ID="General" />
    <ss:Style ss:ID="Number">
      <ss:NumberFormat ss:Format="General Number" />
    </ss:Style>
    <ss:Style ss:ID="DateTime">
      <ss:NumberFormat ss:Format="General Date" />
    </ss:Style>
    <ss:Style ss:ID="Currency">
      <ss:NumberFormat ss:Format="Currency" />
    </ss:Style>
    <ss:Style ss:ID="ShortDate">
      <ss:NumberFormat ss:Format="Short Date" />
    </ss:Style>
  </ss:Styles>
  <ss:Worksheet ss:Name="Sheet1">
    <ss:Table>
      <ss:Row>
        <ss:Cell>

<Target Name="MyAfterBuild">
	<Message Text="==================MESSAGE=================="/>
	<Warning Text="==================WARNING=================="/>
	<Error Text="==================ERROR=================="/>
<Target/>

private void Saveimg(Image image)
        { 
MemoryStream stream = new MemoryStream();
image.Save(stream,System.Drawing.Imaging.ImageFormat.Jpeg);//throw exeption

byte[]imgdata= new byte[stream.Length];
imgdata= stream.ToArray();
string Filename = "c:\\" + Convert.ToString(DateTime.Now.ToFileTime()) +".jpg";

FileStream fs = new FileStream(Filename, FileMode.CreateNew, FileAccess.Write);
fs.Write(imgdata, 0, imgdata.Length);            
fs.Close();

}