C# Datatable Linq Filter

var tempDataTable = dataTable.AsEnumerable().Where(dr => ServerFolderExistsAtDatabaseScriptsFolder(dr[ScriptSolutionsColumnNameResource.ServerName].ToString())).CopyToDataTable();

internal static bool ServerFolderExistsAtDatabaseScriptsFolder(string serverName)

        {

            string serverScriptFolder = Path.Combine(ConfigurationManager.TfSettings.Application.CustomSettings["VMServerAndDatabasePath"], serverName);

            return Directory.Exists(serverScriptFolder);

        }