/// <summary>
/// Indicates whether the passed in INullable's String value is null or a String with just blank
/// characters in it.
/// </summary>
/// <param name="o">The INullable object to test</param>
/// <returns>True if the object's IsNull property is true or its String value is blank</returns>
public static bool IsNullOrBlank(INullable o)
{
if (o == null)
{
return(true);
}
if (o.IsNull)
{
return(true);
}
else
{
return(IsNullOrBlank(o.ToString()));
}
}
