LineLoad

 private void LineLoadInformation(LineLoad lineLoad)
{
     StringBuilder information = new StringBuilder("Line Load: ");

     // Get the load case name
     information.Append("\nLoad case for load: " + lineLoad.LoadCaseName);

     //Get the three dimensional force applied to the start point and end point of the line load.
     information.Append("\nForce at the start of this line load: " + XYZToString(lineLoad.ForceVector1));
     information.Append("\nForce at the end of this line load: " + XYZToString(lineLoad.ForceVector2));

     //Get the three dimensional location of the start point and end point for the line load.
     information.Append("\nStart point of this line load: " + XYZToString(lineLoad.StartPoint));
     information.Append("\nEnd Point of this line load: " + XYZToString(lineLoad.EndPoint));

     //Get the three dimensional moment applied to the start point and end point of the line load.
     information.Append("\nMoment at the start of this line load: " + XYZToString(lineLoad.MomentVector1));
     information.Append("\nMoment at the end of this line load: " + XYZToString(lineLoad.MomentVector2));

     //Whether the load is projected or not
     if (lineLoad.IsProjected)
     {
         information.Append("\nThis line load is projected.");
     }
     else
     {
         information.Append("\nThis line load is not projected");
     }

     //Report if the load is uniform
     if (false != lineLoad.IsUniform)
     {
         information.Append("\nThis load is uniform.");
     }
     else
     {
         information.Append("\nThis load is not uniform.");
     }

     //show information of lineload in a MessageBox.
     TaskDialog.Show("Revit",information.ToString());
 }

 // output the point's three coordinates
 string XYZToString(XYZ point)
 {
     return "(" + point.X + ", " + point.Y + ", " + point.Z + ")";
 }