what is the c parameter in this source code? : <p>I want to know what is the c in the below source code . can you explain me what is it doing ???</p>

<pre><code>        private void txtFamilytoSearch_TextChanged(object sender, EventArgs e)
    {
        var db = new LINQDataContext();
        if (txtFamilytoSearch.Text == "")
            gvTable.DataSource = db.MyTables;
        else
            gvTable.DataSource = db.MyTables.Where(c =&gt; c.Family.Substring(0, txtFamilytoSearch.Text.Length) == txtFamilytoSearch.Text).Select(c =&gt; c);

    }
</code></pre>

<p>this is some part of C# code in linq tecnology. </p>

<p>thank you ;-)</p>
