C# DateTime ToString format method. Here are examples which cover all type of string representation of date into other formats of Date String.
Let's see them one by one. DateTime Instace.ToString(“d”) returns only date part.

DateTime to string [C#] Example.

 using System;
namespace DateAndTime.Examples
{
class Program
{
static void Main(string[] args)
{
DateTime dt = DateTime.Parse("01/30/2012 11:03:05 PM");
Console.WriteLine("Full Date To string: dt.ToString() = " + dt.ToString());
Console.WriteLine("Extract only date part from date: dt.ToString(\"d\") = " + dt.ToString("d"));
Console.WriteLine("Extract date with month in words: dt.ToString(\"D\") = " + dt.ToString("D"));
Console.WriteLine("Long date with month in words: dt.ToString(\"f\") = " + dt.ToString("f"));
Console.WriteLine("Long date with month in words: dt.ToString(\"F\") = " + dt.ToString("F"));
Console.WriteLine("Date with time string: dt.ToString(\"g\") = " + dt.ToString("g"));
Console.WriteLine("Date with time in seconds string: dt.ToString(\"G\") = " + dt.ToString("G"));
Console.WriteLine("Month and year string: dt.ToString(\"m\") = " + dt.ToString("m"));
Console.WriteLine("Full date in words: dt.ToString(\"r\") = " + dt.ToString("r"));
Console.WriteLine("dt.ToString(\"s\") = " + dt.ToString("s"));
Console.WriteLine("dt.ToString(\"t\") = " + dt.ToString("t"));
Console.WriteLine("dt.ToString(\"T\") = " + dt.ToString("T"));
Console.WriteLine("dt.ToString(\"u\") = " + dt.ToString("u"));
Console.WriteLine("dt.ToString(\"U\") = " + dt.ToString("U"));
Console.WriteLine("dt.ToString(\"y\") = " + dt.ToString("y"));
Console.ReadLine();
}
}
}

Vb.Net example of DateTime to String format

Namespace DateAndTime.Examples
Class Program
Private Shared Sub Main(args As String())
Dim dt As DateTime = DateTime.Parse("01/30/2012 11:03:05 PM")
Console.WriteLine("Full Date To string: dt.ToString() = " & dt.ToString())
Console.WriteLine("Extract only date part from date: dt.ToString(""d"") = " & dt.ToString("d"))
Console.WriteLine("Extract date with month in words: dt.ToString(""D"") = " & dt.ToString("D"))
Console.WriteLine("Long date with month in words: dt.ToString(""f"") = " & dt.ToString("f"))
Console.WriteLine("Long date with month in words: dt.ToString(""F"") = " & dt.ToString("F"))
Console.WriteLine("Date with time string: dt.ToString(""g"") = " & dt.ToString("g"))
Console.WriteLine("Date with time in seconds string: dt.ToString(""G"") = " & dt.ToString("G"))
Console.WriteLine("Month and year string: dt.ToString(""m"") = " & dt.ToString("m"))
Console.WriteLine("Full date in words: dt.ToString(""r"") = " & dt.ToString("r"))
Console.WriteLine("dt.ToString(""s"") = " & dt.ToString("s"))
Console.WriteLine("dt.ToString(""t"") = " & dt.ToString("t"))
Console.WriteLine("dt.ToString(""T"") = " & dt.ToString("T"))
Console.WriteLine("dt.ToString(""u"") = " & dt.ToString("u"))
Console.WriteLine("dt.ToString(""U"") = " & dt.ToString("U"))
Console.WriteLine("dt.ToString(""y"") = " & dt.ToString("y"))
Console.ReadLine()
End Sub
End Class
End Namespace

DateTime other examples

How to format Time in C#.net and VB.net program.
DateTime Time Format string {HH:mm:ss}.
C#.net date time Culture.
C#.net DateTime Month.
string was not recognized as a valid date time
Get Today
DateTime in English UK format
Get Day Of year
DateTime.Today vs. DateTime.Now
DateTime Parse Exact method.
Parse Exact DateTime
DateTime Get difference in days, minute, seconds