c# - How to remove characters from a string

Remove characters from a String
The String represents text as a sequence of UTF-16 code units. The String is a sequential collection of characters that is used to represent text. The String is a sequential collection of System.Char objects.

The following .net c# tutorial code demonstrates how we can remove characters from a String instance. So, in this .net c# tutorial code we will remove a specified number of characters from a String object from the specified character position. Here we will use String Remove() method to do this.

The String Remove() method returns a new String in which a specified number of characters from the current String are deleted. The String Remove() method has two overloads.

The String Remove(int startIndex) returns a new String in which all the characters in the current instance, beginning at a specified position and continuing through the last position, have been deleted. So using this overload we can delete all the characters from a String after a specified index position.

The String Remove(int startIndex, int count) method overload returns a new String in which a specified number of characters in the current instance beginning at a specified position has been deleted. So using this overload we can delete a specified number of characters from a String instance at the specified index position.
string-remove.aspx

<%@ Page Language="C#" AutoEventWireup="true"%>

<!DOCTYPE html>  
<script runat="server"> 
    protected void Button1_Click(object sender, System.EventArgs e)  
    {
        //this section create a string variable.
        string plants = "Coconut. Coakum. Coffee Plant. Colic Weed";

        Label1.Text = "string of plants..................<br />";
        Label1.Text += plants+"<br />";

        //this line get first 7 characters of string and remove other.
        string result = plants.Remove(7);
        
        //remove 5th character only from string
        string result2 = plants.Remove(5,1);

        Label1.Text += "<br />first 7 characters of string: " + result;
        Label1.Text += "<br />string without 5th character: " + result2;
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - string remove</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:MidnightBlue; font-style:italic;">  
            c# example - string remove
        </h2>  
        <hr width="550" align="left" color="Gainsboro" />  
        <asp:Label   
            ID="Label1"   
            runat="server"  
            Font-Size="Large"
            >  
        </asp:Label>  
        <br /><br />
        <asp:Button   
            ID="Button1"   
            runat="server"   
            Text="string remove"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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