Returns an Shading object which on which you can manipulate the default shading (fill color and/or pattern) properties of a table's cells that has this formatting.

public Shading DefaultShading{ get; }
Public ReadOnly Property DefaultShading() As Shading

MS Word equivalent: Format menu > Borders and Shading... > Shading tab

          oTableFormatting.Shading.BackgroundColor = Color.Gray;
        
          oTableFormatting.Shading.BackgroundColor = Color.Gray