Question: Actually I am new here and not familiar about placeholder. Just hear about it and find generally in ASP.Net.

my question is PlaceHolder is not available in local C# is there any similar control is there or not then how to access the PlaceHolder in local C# Application.

Guide me Please.

Answer: 
The placeholder is an Asp.net control which you drag from the toolbox on your page.
There is no such thing in C#

Here is an example of how to use it:

<http://www.aspxcode.net/free-asp-net-sample-source-code-c.aspx?Topics=How%20to%20Use%20PlaceHolder>

Hope that helps.
With 'local' You mean so called win forms? Maybe wpf?

In win forms it would be 'Panel' control if I remember correctly.