c# - How to get the capacity of a StringBuilder

c# example - stringbuilder capacity
stringbuilder-capacity.aspx

<%@ Page Language="C#" AutoEventWireup="true"%>
  
<!DOCTYPE html>
  
<script runat="server"> 
    protected void Button1_Click(object sender, System.EventArgs e)  
    {
        StringBuilder stringb = new StringBuilder();

        stringb.Append("Red Lory. ");

        Label1.Text = stringb.ToString();
        Label1.Text += "<br />stringbuilder length: " + stringb.Length + " | capacity: " + stringb.Capacity;

        stringb.Append("Pallid Swift. ");

        Label1.Text += "<br /><br />" + stringb.ToString();
        //stringbuilder doubles its capacity
        Label1.Text += "<br />stringbuilder length: " + stringb.Length + " | capacity: " + stringb.Capacity;

        stringb.Append("Rufous Piculet. ");
        stringb.Append("Cardinal Woodpecker");

        Label1.Text += "<br /><br />" + stringb.ToString();
        //stringbuilder doubles its capacity
        Label1.Text += "<br />stringbuilder length: " + stringb.Length + " | capacity: " + stringb.Capacity;
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - stringbuilder capacity</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:MidnightBlue; font-style:italic;">  
            c# example - stringbuilder capacity
        </h2>  
        <hr width="550" align="left" color="Gainsboro" />  
        <br />  
        <asp:Label   
            ID="Label1"   
            runat="server"  
            Font-Size="Large"  
            >  
        </asp:Label>  
        <br /><br /><br />
        <asp:Button   
            ID="Button1"   
            runat="server"   
            Text="stringbuilder capacity"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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