Get the index of an item in a list in C#

int index = myList.FindIndex(a => a.Prop == oProp);

If you don't want to use LINQ, then:
int index;
for (int i = 0; i < myList.Count; i++)
{
    if (myList[i].Prop == oProp)
    {
       index = i;
       break;
    }
}

Validate Date in C#

DateTime dt;
if (DateTime.TryParseExact(str, "M/d/yyyy", null, DateTimeStyles.None, out dt) == true)
{
//your date is valid and is in dt
}

Generate class from database table

 declare @TableName sysname = 'tbBatch'
declare @Result varchar(max) = 'public class ' + @TableName + '
{'

select @Result = @Result + '
    public ' + ColumnType + NullableSign + ' ' + ColumnName + ' { get; set; }
'
from
(
    select
        replace(col.name, ' ', '_') ColumnName,
        column_id ColumnId,
        case typ.name
            when 'bigint' then 'long'
            when 'binary' then 'byte[]'
            when 'bit' then 'bool'
            when 'char' then 'string'
            when 'date' then 'DateTime'
            when 'datetime' then 'DateTime'
            when 'datetime2' then 'DateTime'
            when 'datetimeoffset' then 'DateTimeOffset'
            when 'decimal' then 'decimal'
            when 'float' then 'float'
            when 'image' then 'byte[]'
            when 'int' then 'int'
            when 'money' then 'decimal'
            when 'nchar' then 'string'
            when 'ntext' then 'string'
            when 'numeric' then 'decimal'
            when 'nvarchar' then 'string'
            when 'real' then 'double'
            when 'smalldatetime' then 'DateTime'
            when 'smallint' then 'short'
            when 'smallmoney' then 'decimal'
            when 'text' then 'string'
            when 'time' then 'TimeSpan'
            when 'timestamp' then 'DateTime'
            when 'tinyint' then 'byte'
            when 'uniqueidentifier' then 'Guid'
            when 'varbinary' then 'byte[]'
            when 'varchar' then 'string'
            else 'UNKNOWN_' + typ.name
        end ColumnType,
        case
            when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier')
            then '?'
            else ''
        end NullableSign
    from sys.columns col
        join sys.types typ on
            col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id
    where object_id = object_id(@TableName)
) t
order by ColumnId

set @Result = @Result  + '
}'

print @Result

Create Log in c#

We can easliy create log by using File.AppendAllText() method because by using this method, it is guaranteed that the file handle will be closed, even if exceptions are raised.

1 2 3 4 5 6 7

public static class Logger {     public static void Log(string message)     {         File.AppendAllText("C:\\LogFile.txt", DateTime.Now.ToShortDateString() + " " + DateTime.Now.ToShortTimeString() + ":\t" + message + Environment.NewLine);     } }

Append TimeStamp to a File Name C#

DateTime.Now.ToString("yyyyMMddHHmmssfff")

or string.Format

string.Format("{0:yyyy-MM-dd_hh-mm-ss-tt}",DateTime.Now);


There are following custom format specifiers y (year), M (month), d (day), h (hour 12), H (hour 24), m (minute), s (second), f (second fraction), F (second fraction, trailing zeroes are trimmed), t (P.M or A.M) and z (time zone).


With Extension Method

Usage:
string result = "myfile.txt".AppendTimeStamp();
//test20160604234625642.txt

public static class MyExtensions
{
    public static string AppendTimeStamp(this string fileName)
    {
        return string.Concat(
            Path.GetFileNameWithoutExtension(fileName),
            DateTime.Now.ToString("yyyyMMddHHmmssfff"),
            Path.GetExtension(fileName)
            );
    }
}

The server response was: 5.5.1 authentication required in Gmail

Introduction 

          Today i came  across an forum post saying  cant able to send a mail to his domain that he purchased but able to send mail to gmail to gmail.The actual is gmail wants the clients to be secure even throw we set EnableSsl = true;

simply it wont work.

       

           To fix the issue add the RemoteCertificateValidationCallback then it will work fine.

1. public class Program  
2.     {  
3.         static void Main(string[] args)  
4.         {  
5.             string senderID = "xxx@gmail.com";  
6.             string senderPassword = "xxxx";  
7.             RemoteCertificateValidationCallback orgCallback = ServicePointManager.ServerCertificateValidationCallback;  
8.             string body = "Test";  
9.             try  
10.             {  
11.                 ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(OnValidateCertificate);  
12.                 ServicePointManager.Expect100Continue = true;  
13.                 MailMessage mail = new MailMessage();  
14.                 mail.To.Add("danish.habib@plan-international.org");  
15.                 mail.From = new MailAddress(senderID);  
16.                 mail.Subject = "My Test Email!";  
17.                 mail.Body = body;  
18.                 mail.IsBodyHtml = true;  
19.                 SmtpClient smtp = new SmtpClient();  
20.                 smtp.Host = "smtp.gmail.com";  
21.                 smtp.Credentials = new System.Net.NetworkCredential(senderID, senderPassword);  
22.                 smtp.Port = 587;  
23.                 smtp.EnableSsl = true;  
24.                 smtp.Send(mail);  
25.                 Console.WriteLine("Email Sent Successfully");  
26.             }  
27.             catch (Exception ex)  
28.             {  
29.                 Console.WriteLine(ex.Message);  
30.             }  
31.             finally  
32.             {  
33.                 ServicePointManager.ServerCertificateValidationCallback = orgCallback;  
34.             }  
35.         }  
36.   
37.         private static bool OnValidateCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)  
38.         {  
39.             return true;  
40.         }  
41.     }