How to generate a Unique Identifier and add it to your DICOM DataSet

private string GenerateNewUid(string orgroot)
{
   //Gets date/time
   var now = DateTime.Now;

   //Gets numeric date info without year...exact military time
   string zeroDate = now.Month.ToString() + now.Day.ToString() + "." + now.Hour.ToString() + now.Minute.ToString() + now.Second.ToString() + now.Millisecond.ToString();

   //Globally Unique Identifier
   string guid = new string(Guid.NewGuid().ToString().Where(char.IsDigit).ToArray());

   //Combines the strings
   string sopUid = $"{orgroot}.{zeroDate}.{guid}";

   //check the length of the string to see if it's over 64 characters long, if it is, then make a substring of it that is 64 chars long starting at char index 0
   //otherwise, use the original string
   sopUid = sopUid.Length > 64 ? sopUid.Substring(0, 64) : sopUid;
   return sopUid;
}

//reserved org root for DICOM
string orgnum = "1.2.840.10008";

//Generate a new unique Identifier
string uid = GenerateNewUid(orgnum);

//Now add the Unique Identifier to your Dicom DataSet

//Start Dicom engine
DicomEngine.Startup();

DicomDataSet ds = new DicomDataSet();

//Removes all the items from the Data Set
ds.Reset();

//Creates the Data Set object, inserting the appropriate elements for the specified class.
ds.Initialize(DicomClassType.SCImageStorage, DicomDataSetInitializeFlags.AddMandatoryElementsOnly | DicomDataSetInitializeFlags.ExplicitVR);

//Finds or inserts (if not found) an element in the data set and sets the value of the element
ds.InsertElementAndSetValue(DicomTag.SOPInstanceUID, uid);