error in c# design code

Question

/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

protected override void Dispose(bool disposing)

{

if (disposing && (components != null))

{

components.Dispose();

}

base.Dispose(disposing);

}

error:

Error 2 'dataentry.Form1.Dispose(bool)': no suitable method found to override 

please solve this..