C# Void function return values to string
<p>I have this void function, and since a void function doesn't return values, how can I pass the strings to the below method when I click the search button?</p>

<p>I need to make the if else statement to return the correct value, but the return doenst work since it is void :(</p>

<pre><code>private void btnSearch_Click(object sender, EventArgs e)
{

string brand;
string model;
string type;
string club;

//brand
if (this.cbBrand.SelectedValue == null)
{
    brand = "";
}
else
{
    brand = this.cbBrand.SelectedValue.ToString();
}
return brand;

//model
if (this.cbModel.SelectedValue == null)
{
    model = "";
}
else
{
    model = this.cbModel.SelectedValue.ToString();
}
return model;

//type
if (this.cbType.SelectedValue == null)
{
    type = "";
}
else
{
    type = this.cbType.SelectedValue.ToString();
}
return type;

//club
if (this.cbClub.SelectedValue == null)
{
    club = "";
}
else
{
    club = this.cbClub.SelectedValue.ToString();
}
return club;

searchMain(brand, model, type, club);
}
</code></pre>
