Miscellaneous - Effective C# - page 291

if (value is PayrollData )
data.Add(( PayrollData )value);
return data.Count;
}
public void Clear() { data.Clear(); }
public bool Contains( object value)
{
if (value is PayrollData )
return data.Contains(( PayrollData )value);
else
// If the argument isn't the right type,
// it must not be here.
return false ;
}
public int IndexOf( object value)
{
if (value is PayrollData )
return data.IndexOf(( PayrollData )value);
else
return - 1 ;
}
public void Insert( int index, object value)
{ if (value is PayrollData )
data.Insert(index, ( PayrollData )value); }
public bool IsFixedSize
{ get { return (data as IBindingList ).IsFixedSize; } }
public bool IsReadOnly
{ get { return (data as IBindingList ).IsReadOnly; } }
public void Remove( object value)
{
if (value is PayrollData )
data.Remove(( PayrollData )value);
}