How to execute *.sql mysql file in my c# application

Take a look here. You should specify a delimiter for MySqlScript (since you have stored procedure in there). And your query should look like:

-- Set DB version 
CALL osae_sp_object_property_set('SYSTEM', 'DB Version', '0.3.5', '', '')$$
CALL osae_sp_object_property_set('SYSTEM', 'Debug', 'FALSE', '', '')$$
CALL osae_sp_object_type_property_add ('Prune Logs','Boolean','TRUE','SYSTEM',0)$$
CALL osae_sp_object_property_set ('SYSTEM','Prune Logs','TRUE','','')$$



DROP PROCEDURE IF EXISTS osae_sp_object_event_script_update$$
CREATE DEFINER = 'root'@'localhost'
PROCEDURE osae_sp_object_event_script_update(IN pobject varchar(200), IN pevent varchar(200), IN ptext text)
BEGIN
DECLARE vObjectCount INT;
DECLARE vObjectID INT;
DECLARE vObjectTypeID INT;
DECLARE vEventCount INT;
DECLARE vEventID INT;
    SELECT COUNT(object_id) INTO vObjectCount FROM osae_object WHERE UPPER(object_name)=UPPER(pobject);
    IF vObjectCount > 0 THEN
              SELECT object_id,object_type_id INTO vObjectID,vObjectTypeID FROM osae_object WHERE UPPER(object_name)=UPPER(pobject);
        SELECT COUNT(event_id) INTO vEventCount FROM osae_object_type_event WHERE object_type_id=vObjectTypeID AND (UPPER(event_name)=UPPER(pevent) OR UPPER(event_label)=UPPER(pevent));
        IF vEventCount = 1 THEN     
            SELECT event_id INTO vEventID FROM osae_object_type_event WHERE object_type_id=vObjectTypeID AND (UPPER(event_name)=UPPER(pevent) OR UPPER(event_label)=UPPER(pevent));
            UPDATE osae_object_event_script SET event_script=ptext WHERE object_id=vObjectID AND event_id=vEventID;
         -- CALL osae_sp_debug_log_add(CONCAT('Updated ',vObjectID,' - ',vEventID,ptext),'');  
        END IF;
    END IF; 
END
$$

And then your code:

MySqlScript script = new MySqlScript(connection, File.ReadAllText("script.sql"));
script.Delimiter = "$$";
script.Execute();