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c# - How to add minutes to DateTime

DateTime AddMinutes() Method
The following ASp.NET C# example code demonstrates to us how can we add minutes to a DateTime object programmatically at run time. The .Net framework's DateTime AddMinutes() method allows us to add one or more minutes with a DateTime object.

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

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

The DateTime AddMinutes() method through ArgumentOutOfRangeException exception 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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