با تشکر.

        protected virtual string ConnectionString
        {
            get
            {
                return (string)DbConnection.GetPrivateFieldValue("_connectionString");
            }
        }

protected virtual string ConnectionString {
  get {
    return (string)DbConnection.ConnectionString;
  }
}

Math.Sinh(123456.12).ToString();

Math.Sinh(123456.12).ToString(CultureInfo.InvariantCulture);

کد استفاده شده جهت طراحی گزارش 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using FastReport;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string[] List = System.IO.File.ReadAllLines("List.TXT");
            var Query = from list in List
                        let items = list.Split(',')
                        select new
                        {
                            Id = Convert.ToInt32(items[0]),
                            FName = items[1],
                            LName = items[2]
                        };

            using (Report report = new Report())
            {
                report.RegisterData(Query.ToList(), "myQuery");
                report.Design();
            }
        }
    }
}

نمایش گزارش ذخیره شده در List.frx با استفاده از کد زیر

 report.Load("List.frx");

 report.Show();

خروجی گزارش ساخته شده

سورس برنامه نمونه

Linq_FastReport-sample.rar

/// <summary>
/// Get an author by his/her id
/// </summary>
/// <param name="authorId">The id of the author you want to get</param>
/// <returns>An ActionResult of type Author</returns>
[HttpGet("{authorId}")]
public async Task<ActionResult<Author>> GetAuthor(Guid authorId)

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
    <GenerateDocumentationFile>true</GenerateDocumentationFile>
  </PropertyGroup>

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSwaggerGen(setupAction =>
            {
                setupAction.SwaggerDoc(
                    // ... 
                   );

                var xmlCommentsFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                var xmlCommentsFullPath = Path.Combine(AppContext.BaseDirectory, xmlCommentsFile);
                setupAction.IncludeXmlComments(xmlCommentsFullPath);
            });
        }

using System;

namespace OpenAPISwaggerDoc.Models
{
    /// <summary>
    /// An author with Id, FirstName and LastName fields
    /// </summary>
    public class Author
    {
        /// <summary>
        /// The id of the author
        /// </summary>
        public Guid Id { get; set; }

        /// <summary>
        /// The first name of the author
        /// </summary>
        public string FirstName { get; set; }

        /// <summary>
        /// The last name of the author
        /// </summary>
        public string LastName { get; set; }
    }
}

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <GenerateDocumentationFile>true</GenerateDocumentationFile>
  </PropertyGroup>
</Project>

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSwaggerGen(setupAction =>
            {
                setupAction.SwaggerDoc(
  // ...
                   );
                var xmlFiles = Directory.GetFiles(AppContext.BaseDirectory, "*.xml", SearchOption.TopDirectoryOnly).ToList();
                xmlFiles.ForEach(xmlFile => setupAction.IncludeXmlComments(xmlFile));
            });
        }

[HttpPut("{authorId}")]
public async Task<ActionResult<Author>> UpdateAuthor(Guid authorId, AuthorForUpdate authorForUpdate)

using System.ComponentModel.DataAnnotations;

namespace OpenAPISwaggerDoc.Models
{
    /// <summary>
    /// An author for update with FirstName and LastName fields
    /// </summary>
    public class AuthorForUpdate
    {
        /// <summary>
        /// The first name of the author
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string FirstName { get; set; }

        /// <summary>
        /// The last name of the author
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string LastName { get; set; }
    }
}

[HttpPut("{authorId}")]
public async Task<ActionResult<Author>> UpdateAuthor(Guid authorId, AuthorForUpdate authorForUpdate)

[HttpPatch("{authorId}")]
public async Task<ActionResult<Author>> UpdateAuthor(
            Guid authorId,
            JsonPatchDocument<AuthorForUpdate> patchDocument)

/// <summary>
/// Partially update an author
/// </summary>
/// <param name="authorId">The id of the author you want to get</param>
/// <param name="patchDocument">The set of operations to apply to the author</param>
/// <returns>An ActionResult of type Author</returns>
/// <remarks>
/// Sample request (this request updates the author's first name) \
/// PATCH /authors/id \
/// [ \
///     { \
///       "op": "replace", \
///       "path": "/firstname", \
///       "value": "new first name" \
///       } \
/// ] \
/// </remarks>
[HttpPatch("{authorId}")]
public async Task<ActionResult<Author>> UpdateAuthor(
    Guid authorId,
    JsonPatchDocument<AuthorForUpdate> patchDocument)

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>

    <GenerateDocumentationFile>true</GenerateDocumentationFile>
    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
    <WarningsAsErrors>NU1605;</WarningsAsErrors>
    <NoWarn>1701;1702;1591</NoWarn>
  </PropertyGroup>