What does SONAR Error AvoidRepetitiveCallsToPropertiesRule mean?

I have this below piece of code, which i always highlighted by SONAR as a MAJOR issue, because of violation of a rule called with the below message.

Multiple (3) calls to virtual property 'System.String System.Reflection.MemberInfo::get_Name()'.

And the rule description says

AvoidRepetitiveCallsToPropertiesRule gendarme : AvoidRepetitiveCallsToPropertiesRule The rule warn if virtual, or unlikely to be inline-able, property getters are called several times by a method. In most cases repetitive calls simply requires more time without any gains since the result will always be identical. You should ignore the reported defects if a different value is expected each time the property is called (e.g. calling DateTime.Now).

private static void OverrideConfigurationValues(ConfigA configa,
            ConfigB configb, ConfigC configc) 
        {
            Type t = configa();

            var properties = t.GetProperties(BindingFlags.Public | BindingFlags.Instance);
            var overriddenvalues = new Dictionary<string, object>();
            foreach (var prop in properties)
            {
                var value = prop.GetValue(configa,null);

                if (value != null)
                {
                    overriddenvalues.Add(prop.Name, value);
                }
            }

            Type b  = configb.GetType();
            foreach (var prop in b.GetProperties(BindingFlags.Public | BindingFlags.Instance))
            {
                if (!overriddenvalues.ContainsKey(prop.Name))
                {
                    var value = prop.GetValue(b,null);
                    if (value != null)
                    {

                        overriddenvalues.Add(prop.Name, value);
                    }
                }
            }

            foreach (var overriddenvalue in overriddenvalues)
            {
                var overriden = overriddenvalue;

                foreach (var prop in configa.GetType().GetProperties().Where(prop => prop.Name == overriden.Key))
                {
                    prop.SetValue(configa, overriddenvalue.Value,null);
                }
            }
        }

If the SONAR is complaining about the line prop.Name which i have inside the foreach loop? How can i avoid it?