Hi Friends,

Today I will tell you about using the custom helper in mvc. We can create our own helper extension.We have multiple extensions as shown below in figure:-

As these above extensions are predefined. But we can define our own extension which will be used in all razor views.

Below are the steps:-
1. Firstly create a class and put a proper name i am using the name  "Helper" and I am creating a label as shown below in the code:-

namespace CustomHelper
{
    public static class Helper
    {
        public static IHtmlString CustomHelper(this HtmlHelper htmlHelper)
        {
            return new HtmlString("<label>This is Sample Custom Helper</label>");
        }
    }
}

2. Now add the namespace in the web.config of the Views where all namespace are added. Put there 

 <add namespace="CustomHelper" />  

 Where "CustomHelper" is the name of the namespace that i am using.

3. Now we can use our helper in all views as shown below in the figure.

Have any query do mention in comments.

Thanks
Happy Coding!!