How can I implement multiple try blocks

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C#

For you all, "if one method throws an exception, the other methods will not run." this is the main reason I am using separate try..catch blocks. So that, even if a function gives an exception, the next can execute.

Can you suggest me a nice approach other than I am using here to execute the next function even if an exception occurred during the first function.

My Code

public XmlDocument GetXML(string[] arrInputInfo)
{
string rtnErrno=null;
ArrayList rtnValidateLogin=null;
string rtnPostSMS = null;
string strStartDateTime = DateTime.Now.ToString();
string strEndDateTime = DateTime.Now.ToString();
DataSet dst=new DataSet(); 
string[] arrLogReq = new string[5];
string strLoginRef = "-999";
string strstatus = "20";
 

 
try
{
//Validate Input Details
rtnErrno = ValidateInputInfo(arrInputInfo);
 
if (rtnErrno != "0")
{
throw new Exception("Exception raised at Input Validation");
}
//Validate Login Details
rtnValidateLogin = objLogin.ValidateCPLogin(arrInputInfo[0], arrInputInfo[1]);
 
if (rtnValidateLogin[0].ToString() != "0")
{
rtnErrno = rtnValidateLogin[0].ToString();
throw new Exception("Exception raised at Login Validation");
}
else
{
dst = (DataSet)rtnValidateLogin[1];
strLoginRef = dst.Tables[0].Rows[0][0].ToString();
}

//Insert Message
rtnPostSMS = PostSMSText(arrInputInfo);
 
if (rtnPostSMS.ToString() != "0")
{
rtnErrno = rtnPostSMS[0].ToString();
throw new Exception("Exception raised at Inserting Message");
}


}
catch (Exception ex)
{
strstatus = "30";
LogErrorHelper.LogError(Constants.ERROR_WEBSERVICES_LOGFILE, ex, "BLL.CSMSService-->GetXML");
}
finally
{
GC.Collect();
}
 

try
{
strEndDateTime = DateTime.Now.ToString();
arrLogReq[0] = strLoginRef; //Login Ref no 
arrLogReq[1] = string.Concat(arrInputInfo[2], "~", arrInputInfo[3]); //Mobile No and Message
arrLogReq[2] = strStartDateTime; //start time
arrLogReq[3] = strEndDateTime; //end time
arrLogReq[4] = strstatus;
//To Log Incoming Requests
rtnErrno = LogConfirmation(arrLogReq);
}
catch (Exception ex)
{
LogErrorHelper.LogError(Constants.ERROR_WEBSERVICES_LOGFILE, ex, "BLL.CSMSService-->GetXML");
}
finally
{
GC.Collect();
}
return GetFinalXml(rtnErrno);
}

Thanks in Advance...