Generic string to enum conversion

Suppose enum:

public enum SysLogsAppTypes { None, MonitorService, MonitorTool };

and here is a function to convert from the ToString() representation back to enum:

private SysLogsAppTypes Str2SysLogsAppTypes(string str)  
{  
    try  
    {  
        SysLogsAppTypes res = (SysLogsAppTypes)Enum
                                       .Parse(typeof(SysLogsAppTypes), str);  
        if (!Enum.IsDefined(typeof(SysLogsAppTypes), res)) 
            return SysLogsAppTypes.None;  
        return res;  
    }  
    catch  
    {  
    return SysLogsAppTypes.None;  
    }  
}  

Is there a way to make this Generic ??

I tried:

private T Str2enum<T>(string str)   
{  
    try  
    {  
        T res = (T)Enum.Parse(typeof(T), str);  
        if (!Enum.IsDefined(typeof(T), res)) return T.None;  
        return res;  
    }  
    catch  
    {  
        return T.None;  
    }  
}  

but I get: 'T' is a 'type parameter', which is not valid in the given context
where there is T.None

Any help ? Thanks