Сhange value of PropertyTagImageDescription (Bitmap/C#)

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C#

image

Bitmap

Good time! I'm trying to solve the problem of changing the value PropertyTagImageDescription (0x010E) for the Bitmap object. To add a description for the file. Searching the related topics, and has not found the solution. My use:

Bitmap image = new Bitmap(Image.FromFile(fileName));
    var data = System.Text.Encoding.UTF8.GetBytes("My comment");
    PropertyItem propItem = image.GetPropertyItem(Convert.ToInt32(0x010E));
    propItem.Len = data.Length;
    propItem.Value = data;
    image.SetPropertyItem(propItem);

But there is an error : "In GDI + error occurred generic."

Help me understand! What I'm doing wrong?