ShipData.Instance.lstAIVDO.RemoveAll(x => x.SourceName == UnifiedCollectorDataModel.ShipDataModel.Enums.EnumSourceName.O.ToString());

rowguids = String.Join("|", DVAInvoiceList.Where(i => i.IsSelected).Select(p => p.ROWGUID).ToArray());

using System;
using System.Linq;
using System.Collections.Generic;
 
public class Feature
{
	public int Id { get; set; }
	public string ColumnValues { get; set; }
}
 
public class Program
{
	public static void Main()
	{            
		var features = new List<Feature> {  
				    new Feature {Id=1,ColumnValues="cdr_2024-12-11_09-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-01_09-00-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-03_07-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-03_10-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-06_06-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-04_10-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-05_09-00-00.log.gz" },
				    new Feature {Id=1,ColumnValues="cdr_2024-12-05_10-00-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-06_05-00-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-02_08-00-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-01_10-00-00.log.gz" }, 
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-02_10-00-00.log.gz" }, 
				    new Feature {Id=1,ColumnValues="cdr_2024-12-06_06-30-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-07_10-00-00.log.gz" },
                                    new Feature {Id=1,ColumnValues="cdr_2024-12-01_00-00-00.log.gz" }
            };
 
        string strToComapre = "cdr_2024-12-07_00-00-00.log.gz";
        int lenOfString = 1;
	int i = 0;
 
        var query = (from feature in features
                         where String.CompareOrdinal(feature.ColumnValues, strToComapre) >= 0
			//where String.CompareOrdinal(feature.ColumnValues, 0, strToComapre, 0, lenOfString)>= 0
                         select feature)
                         .OrderBy(x => x.ColumnValues);
		Console.WriteLine("Feature: {0}", features.Count());
		foreach (Feature f in query)
		{
			i++;
			Console.WriteLine("|{1}| {0}", i, f.ColumnValues);
		}
	}
}

//...
dtFull = dsSourceFiles.Tables[arrFileToImport[0]].Clone(); //<-- Di Default E PER IPOTESI, il primo file è quello più importante con info pilota
//...
 
//CREAZIONE MATRICE dei valori da riporre nel nuovo DT omnicomprensivo
object[] emptyObj = new object[dsSourceFiles.Tables[arrFileToImport[1]].Columns.Count];
//...
 
//Prima MATRICE DI VALORI per la prima COPPIA di Files\Datatable da integrare per ogni file successivo al SECONDO
var rowData = from
      row1 in dsSourceFiles.Tables[arrFileToImport[0]].AsEnumerable()
join
      row2 in dsSourceFiles.Tables[arrFileToImport[1]].AsEnumerable()
on
      row1.Field<string>(sourceKeyFieldName0).Trim() equals row2.Field<string>(sourceKeyFieldName1).Trim() into row1X
from rowY in row1X.DefaultIfEmpty()
      select
            row1.ItemArray.Concat(rowY == null ? emptyObj : rowY.ItemArray).ToArray();
//...
 
//Costruisce l'insieme delle colonne di 2 File ovvero DataTable
var dt2Columns = dsSourceFiles.Tables[arrFileToImport[f]].Columns.OfType<DataColumn>()
      .Select(dc => new DataColumn(dc.ColumnName, dc.DataType, dc.Expression, dc.ColumnMapping));
//..
 
rowData = from
     row1 in rowData
join
     row2 in dsSourceFiles.Tables[arrFileToImport[f]].AsEnumerable()
on
     row1[0] equals row2.Field<string>(sourceKeyFieldNameF).Trim() into row1X
from rowY in row1X.DefaultIfEmpty()
select
     row1.Concat(rowY == null ? new object[nrColSecondFile] : rowY.ItemArray).ToArray();
//...
 
//Riempimento DataTable con i Valori dai 2\n DataTable.       rowData    ha TUTTI i valori !!!
int rowInserted = 0;
int j = 0;
try
{
	if (!string.IsNullOrEmpty(strCSVAllPositionToRemove))
	{
		foreach (object[] values in rowData) //Riga definitiva con TUTTI i valori da porre nel DataTable DESTINAZIONE
		{
			j = 0;
			DataRow dr = dtFull.NewRow();
			for (int c = 0; c < values.Length; c++)
			{
				if (strCSVAllPositionToRemove.IndexOf("," + c + ",") < 0)
				{
					//string destinationColumnName = dictColMapping[ dr.Table.Columns[j].ColumnName];
					//dr[j] = TransformFieldValueByDestType(singleValue, destinationColumnName, dictColDestType, true);
					//string singleValue = values[c].ToString();
					dr[j] = values[c];
					j++;
				}
			}
			dtFull.Rows.Add(dr);
			rowInserted++;
		}
	}
//... etc etc ...

string[] validNames = names.Split(';');
var query = customers.Where(c => validNames.Contains(c.FirstName));

HashSet<string> validNames = new HashSet<string>(names.Split(';'));
var query = customers.Where(c => validNames.Contains(c.FirstName));

var query = from c in customers
            where validNames.Contains(c.FirstName)
            select c;