Cannot implicitly convert type 'bool' to 'System.EventHandler'

The error message stated in the title of the question is displayed if a boolean value is assigned instead of an Event handler. For example, the Click event of a Button can be handled by assigning the Event handler button1_Click as explainere here
http://msdn.microsoft.com/en-us/library/dfty2w4e(v=vs.80).aspx[^]

button1.Click += new EventHandler(button1_Click);

where button1_Click is declared as below

private void button1_Click(object sender, System.EventArgs e)
{
// Add event handler code here.
}

In the above code if a boolean value is assigned like

button1.Click += variableOfBoolValue;

where variableOfBoolValue is a variable containing a boolean value, then the above error is thrown. To avoid that error assign a Event handler of appropriate type corresponding to the event which is to be handled.

I think this is what can be inferred with the minimum info provided in the question.