c# - How to add minutes to DateTime

DateTime AddMinutes() Method
The following asp.net c# example code demonstrate us how can we add minutes to a DateTime object programmatically at run time. .Net framework's DateTime.AddMinutes() method allow us to add one more more minutes with a date time object.

DateTime.AddMinutes() method exists in System namespace. AddMinutes() method have a required parameter named 'value'. This 'value' parameter value data type is System.Double which represent a number of whole and fractional minutes. This is very interesting that the 'value' parameter value can be negative or positive. So, technically we can also subtract minutes from a DateTime object.

DateTime.AddMinutes() method return value data type is System.DateTime. This return value is a DateTime object which is the sum of specified minutes passes by parameter and specified DateTime object. AddMinutes() method does not modify/change the provided DateTime object instead it return a new DateTime object that is the result of this operation.

The DateTime.AddMinutes() method through ArgumentOutOfRangeException, if the resulting DateTime is less than MinValue or greater than MaxValue.
DateTimeAddMinutes.aspx

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

<!DOCTYPE html>

<script runat="server">
    protected void Page_Load(object sender, System.EventArgs e) {
        Label1.Text = "Now :" + DateTime.Now.ToString();
    }
    protected void Button1_Click(object sender, System.EventArgs e) {
        DateTime now = DateTime.Now;
        DateTime modifiedDatetime = now.AddMinutes(30);
        Label1.ForeColor = System.Drawing.Color.HotPink;
        Label1.Text ="Now :" + now.ToString();
        Label1.Text += "<br />Your Date Time [after added 30 minutes]: " + modifiedDatetime.ToString();
        
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>asp.net date time example: how to add minutes(DateTime.Now.AddMinutes())</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Purple">asp.net date time example: AddMinutes()</h2>
        <asp:Label 
             ID="Label1" 
             runat="server" 
             Font-Size="Larger"
             ForeColor="DodgerBlue"
             >
        </asp:Label>
        <br /><br />
        <asp:Button 
             ID="Button1" 
             runat="server" 
             Font-Bold="true" 
             ForeColor="DodgerBlue" 
             OnClick="Button1_Click"
             Text="Add 30 Minutes With Now"
             />   
    </div>
    </form>
</body>
</html>
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