c# - How to append double quotes in a StringBuilder

c# example - stringbuilder append double quotes
The following asp.net c# example code demonstrate us how can we append text with double quotes to a StringBuilder object programmatically at run time in an asp.net application. .Net framework's StringBuilder Class represent a mutable string of characters.

StringBuilder.Append(String) method allow us to append a copy of the specified string to this instance. So, we can append a substring to a StringBuilder object by using this Append() method. But we cannot directly add/append a double quotes (") to a StringBuilder object. To append a double quotes to stringBuilder object, we need to escape the double quotes by Backslash as (\").

For example, if we want to append a word 'ASP.NET' with surounding double quotes to a StringBuilder object then we can call the Append method as StringBuilder.Append("\"ASP.NET\"").
stringbuilder-append-double-quotes.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("how to append \"double quotes\" in stringbuilder");
        
        Label1.Text = stringb.ToString();
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - stringbuilder append double quotes</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:MidnightBlue; font-style:italic;">  
            c# example - stringbuilder append double quotes
        </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 append double quotes"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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