How to check whether date time in null or not using c#

Question

I have a proxy stub where my variable is of datetime type in the proxy stub and i am assinging that date to my view by getting it from model in need to check whether date time is null or not if null i should show not available in UI

Proxy stub

[DataMember(Order = 9)]

        public System.DateTime? FromDate
        {
            get
            {
                return _FromDate;
            }
            set
            {
                this.SetDirty();
                this._FromDate = value;
            }
        }

Model

model.FromDate = Convert.ToDateTime(MemberInfo.FromDate);

View

 @if ((Model.FromDate!= null))
                {
                    <p>  @Html.DisplayFor(model => model.FromDate) </p>
                }
                else
                {
                    <p> N/A</p>
                }

What i tried is

if(model.FromDate!=null)
{
model.FromDate = Convert.ToDateTime(MemberInfo.FromDate);
}
else{
model.FromDate="Not Available";
}

But i am getting string to date time conversion error

Answer 1

if(model.FromDate!=null)

model.FromDate is actually nullable so null checking will be model.FromDate.HasValue

if model.FromDate = Convert.ToDateTime(MemberInfo.FromDate); giving exception in non formated date strings the use tryparse

  DateTime resultDate;
  if (DateTime.TryParse(MemberInfo.FromDate, out resultDate))

model.FromDate="Not Available";

this cannot be done in c# as it is strongly typed so use another variable

Model

DateTime resultDate;
if (DateTime.TryParse(MemberInfo.FromDate, out resultDate))
   model.FromDate.Value = resultDate;
else
   model.FromDate.Value=null;

View

 @if ((Model.FromDate.HasValue))
     {
          <p>  @Html.DisplayFor(model => model.FromDate) </p>
     }
  else
      {
         <p> Not Available</p>
      }

As Per Comment

model.FromDate=MemberInfo.FromDate