How to get installed .Net Framework version?

Here is the way to find out the installed version of .Net framework on your machine.

Manual Way

1.    Start run >> Regedit

2.  Go to “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\”

3.  Check keys under this. See image below for help.

C#.Net Code

Make sure to include following namespace in your class

       using Microsoft.Win32;

Method to get registry value

       public String GetVersion()

        {

            RegistryKey mobjSubRegistryKey;

            String strVersionDesc = "Installed: ";

            try

            {

                RegistryKey HKLM_Key = Registry.LocalMachine;

                mobjSubRegistryKey = HKLM_Key.OpenSubKey(

@"SOFTWARE\Microsoft\NET Framework Setup\NDP\");

                if (mobjSubRegistryKey == null)

                {

                    return "Not Installed";

                }

                String[] strarray = mobjSubRegistryKey.GetSubKeyNames();

               

                if (strarray == null)

                {

                    return "Not Installed";

                }

                foreach (String str in strarray)

                {

                    if (str == "v1.1.4322")

                    {

                        strVersionDesc += "[.Net Framework 1.1] ";

                    }

                    else if (str == "v2.0.50727")

                    {

                        strVersionDesc += "[.Net Framework 2.0] ";

                    }

                    else if (str == "v3.0")

                    {

                        strVersionDesc += "[.Net Framework 3.0] ";

                    }

                    else if (str == "v3.5")

                    {

                        strVersionDesc += "[.Net Framework 3.5] ";

                    }

                    else if (str == "v4")

                    {

                        strVersionDesc += "[.Net Framework 4.0] ";

                    }

                }

                return strVersionDesc;

            }

            catch(Exception ex)

            {

                return “An Error has occurred while capturing info”;

            }

        }