How to find an item in my database? - asp.net-mvc

Question

So i want to create a person and add it to my table if i dont have the same name already in my table. i have this code in my controller
hesaplamaEntities hsb = new hesaplamaEntities();
[HttpPost]
public ActionResult Create(MyTable p)
{
MyTable obj = hsb.MyTable.Find(p);
if (obj.propname == null)
{
hsb.MyTable.Add(p);
hsb.SaveChanges();
return RedirectToAction("Create", "Home");
}
else
{
return HttpNotFound();
}
and this is my View :
#using (Html.BeginForm("Create", "Home", FormMethod.Post, new { #class =
"form-horizontal", enctype = "multipart/form-data" }))
{
<div class="row">
<div class="form-horizontal">
<div class="form-group">
<div class="col-md-12">
<label class="col-sm-2 control-label">Name</label>
<div class="col-sm-10">
#Html.TextBoxFor(m => m.propname, new { #class = "form-control" })
</div>
</div>
</div>
<div class="form-group">
<div class="col-md-12">
<label class="col-sm-2 control-label">kod</label>
<div class="col-sm-10">
#Html.TextAreaFor(m => m.propkod, new { #class = "form-control" })
</div>
</div>
</div>
</div>
</div>
<div class="panel-footer">
<div class="row">
<div class="col-sm-9 col-sm-offset-3">
<div class="btn-toolbar pull-right">
<input type="submit" value="save" class="btn btn-primary" />
</div>
</div>
</div>
</div>
}
and this is my Model :
public partial class MyTable
{
public int ID { get; set; }
public string propkod { get; set; }
public string propname { get; set; }
}
i am having this error when i am trying to add person :
he specified parameter type 'WebApplication7.Models.MyTable' is not valid. Only scalar types, such as System.Int32, System.Decimal, System.DateTime, and System.Guid, are supported.
and its showing me the error in this line : HesapTemel obj = hsb.HesapTemels.Find(p);
what is the probleme exactly ?