.NET

ConvertUnixTimeStamp.cs

/// <summary>
/// Converts Unix time to a regular DateTime.
/// </summary>
/// <param name="unixTime"></param>
/// <returns></returns>
public static DateTime ConvertUnixTimestamp(double unixTime)
{
    DateTime stdDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
    stdDateTime = stdDateTime.AddMilliseconds(unixTime).ToLocalTime();
    return stdDateTime;
}

ConvertUnixTimestamp.vb

''' <summary>
''' Converts Unix time to a regular DateTime.
''' </summary>
''' <param name="unixTime"></param>
''' <returns></returns>
''' <remarks></remarks>
Private Shared Function ConvertUnixTimestamp(ByVal unixTime As Double) As DateTime
    Dim stdDateTime As New DateTime(1970, 1, 1, 0, 0, 0, 0)
    stdDateTime = stdDateTime.AddMilliseconds(unixTime).ToLocalTime()
    Return stdDateTime
End Function

ctorchaining.cs

public Household(long userId)
    : this(userId, null) { }
    
public Household(long userId, OtherObject otherObj)
{
  // Do stuff here.
}

JSONDates.vb

''' <summary>
''' JSON dates are in Unix time, .NET doesn't handle these very well. This function parses JSON dates from a JSON string and turns them into
''' a normal DateTime format that .NET can handle.
''' </summary>
''' <param name="json"></param>
''' <remarks></remarks>
Public Shared Sub FixJsonDates(ByRef json As String)
    Dim jsonDateRegex As String = "(\/Date\((-)?\d*\)\/)"
    Dim matches = Regex.Matches(json, jsonDateRegex)

    Dim matchDigitsRegex As String = "(\d*)"
    For Each m As Match In matches
        'Example of string matched: /Date(1367467200000)/
        Dim x As String = m.ToString().Replace("/Date(", "")
        x = x.ToString().Replace(")/", "")

        Dim dblTime As Double = 0

        If Double.TryParse(x, dblTime) Then
            Dim convertedDateTime As New DateTime()
            convertedDateTime = ConvertUnixTimestamp(dblTime)

            Dim replacementString As String = String.Empty
            replacementString = convertedDateTime.ToString()

            json = json.Replace(m.ToString(), replacementString)
        End If
    Next
End Sub