.NET is a software development platform designed by Microsoft.
.NET 1, or .NET Framework version 1.0, was released on February 13, 2002.
.NET 2, or .NET Framework version 2.0, was released on January 22, 2006.
.NET 3, or .NET Framework version 3.0, was released on November 21, 2006.
.NET 4, or .NET Framework version 4.0, was released on April 12, 2010.
.NET 5, or .NET version 5.0, was released on November 10, 2020.
.NET 6, or .NET version 6.0, was released on November 08, 2021.