The total number of developers using C# has increased 40% during the in 2006 in EMEA (Europe, Middle East and Africa), Evans Data reports. In 2006 the number of developers using C# any part of the time was 25.1%, and in 2007 that number has risen to 34.9%. In addition, the% of developers using C# more than half the time has also risen by forty% from 9.4% to 13.2%. Careless data validation is the leading cause of security vulnerabilities in the region, followed by buffer overflows. 65% of developers in EMEA either are using or are planning to use AJAX in their development efforts. 40% report extending their data and business processes from legacy host systems to new applications.