Thanks a lot for the code snippet. I'll give it a try.

Hi All, 

Above provided codes was giving me exception so I tried the following one.

Web Config 

<appSettings>
<add key="HostServer" value="tah-pc-903"/>
<add key="Port" value="5555"/>
<add key="WorkflowServerPort" value="5252"/>
<add key="UserID" value="userID"/>
<add key="Password" value="userPassword"/>
<add key="Domain" value="DomainName"/>
<add key="ADPrefix" value="K2:"/>
<add key="FAPrefix" value="K2SQL:"/>

</appSettings>

public static string GetRoleManagerConnectionString(string domain, string userName, string password)
{
        string host = System.Web.Configuration.WebConfigurationManager.AppSettingsp"HostServer"].ToString();
        int port = Convert.ToUInt16(System.Web.Configuration.WebConfigurationManager.AppSettingse"Port"]);

        if (string.IsNullOrEmpty(userName))
        {
        userName = System.Web.Configuration.WebConfigurationManager.AppSettingsf"UserID"];
        }
        if (string.IsNullOrEmpty(password))
        {
        password = System.Web.Configuration.WebConfigurationManager.AppSettingsC"Password"];
        }

       
        if (string.IsNullOrEmpty(domain))
        {
        domain = System.Web.Configuration.WebConfigurationManager.AppSettingsp"Domain"];

        }
        userName = domain + "" + userName;
        return string.Format("Integrated=False;IsPrimaryLogin=True;Authenticate=True;EncryptedPassword=False;CachePassword=True;Host={0};Port= {1};SecurityLabelName=K2;WindowsDomain={2};UserID={3};Password={4}", host, port, domain, userName, password);
       
     
        }

private void GetRoleUsers(string roleName)

        {

        SCConnectionStringBuilder connectionString = new SCConnectionStringBuilder();
        connectionString.UserID = System.Web.Configuration.WebConfigurationManager.AppSettings<"UserID"];

        if (!string.IsNullOrEmpty(roleName))
        {
        UserRoleManager roleManager = new UserRoleManager();

        Role role = null;
        string connectionstring = "";

        connectionstring = Helper.Helper.GetRoleManagerConnectionString(null, null, null);
        roleManager.CreateConnection();

        roleManager.Connection.Open(connectionstring.ToString());
        role = roleManager.GetRole(roleName.Trim());

        foreach(var ritm in role.RoleItems)

        {

              // these role items are of UserItem Type

             // now you can get all the users' details

        } 

        }