Dual U.S Citizenship

Dual Citizenship is when an individual is a citizen of two or more countries. The conception of Dual citizenship, is when an individual exercises rights of citizenship of 2 countries and is subject to responsibility and accountability of both the countries. U.S law discourage Dual Citizenship, though the Government has to accept Dual citizenship only because of the conflicting laws of the other countries. AN individual with dual citizenship of United States is not issued a non immigrant visa, they have to carry their passports every time they enter or leave United States.
If you are an existing US Citizen, and you opt for another countries citizenship then you are no longer considered a United States Citizen. Though there are some exceptions in this law too such as, If a child has acquired citizenship through his or her parents can still be permitted to be a citizen of another country. Dual citizenship is consider I the cases of citizenship through Birth , it is not permitted in cases of citizenship through immigration . U.S does not encourage dual citizenship very positively ,they still have certain reservation as no country would like to lose their control over their citizens.
Given below is a list of those countries who enable their citizens to enjoy Dual citizenship, the list contains those countries who will allow their citizen to retain their citizenship even after he or she has obtained US Citizenship.
Albania ,Argentina, Australia, Brazil (with certain restrictions),Canada, Czech Republic, Cambodia, Colombo, France, Greece, Hungary, Ireland, Bangladesh , Israel, Mexico, New Zealand, Nigeria, Pakistan, Poland, Portugal, Russia, Switzerland, United Kingdom and Turkey.
Countries that do not allow their citizens from obtaining Dual citizenship are as follows-
Austria, Belgium, Burma, China, Chile, Denmark, Germany, India, Indonesia, Iran- (does not recognize dual citizenship but continues to recognize its citizens as Iranian), Japan, Kenya, Korea, Malaysia, Mauritius, Nepal, Norway, Poland, Romania, Singapore, Thailand, Venezuela, Zimbabwe.
An individual who is a existing US Citizen ,and applies for the citizenship of another country is stripped of his or her U.S Citizenship and therefore looses all benefits and privileges that are given to a United States Citizen. The United States Government does recognize Dual citizenship and in some cases where citizenship is gained by birth or by parents it also retains and allows the individual to keep dual citizenship. In the case of citizenship obtained from immigration ,Us law does not permit an immigrant to keep dual citizenship. As a matter of policy US Government doesn’t encourage dual citizenship as it causes a lot of problem in law enforcement.