listBoxl.Items.Add(String.Format(

.NET Framework 2.0 installed? {0} , fx20Installed)); if (fx20Installed) {

listBoxl.Items.Add(String.Format(

.NET Framework 2.0 Exact Version: {0} ,

GetExactVersion(FrameworkVersion.Fx20))); listBoxl.Items.Add(String.Format(

.NET Framework 2.0 Service Pack: {0} ,

GetServicePackLevel(FrameworkVersion.Fx20)));

/ <summary>

/ Определяет, установлена ли указанная версия .NET Framework / на локальном компьютере. / </summary>

/ <param name= frameworkVersion >OflHo из значений / <see cref= FrameworkVersion />.</param>

/ <returns><see langword= true /> если указанная версия .NET Framework

/ установлена; иначе <see langword= false />.</returns>

public static bool Islnstalled(FrameworkVersion frameworkVersion)

bool ret = false;

private void buttonl Click(object sender, EventArgs e) {

bool fxlllnstalled = Islnstalled(FrameworkVersion.Fxll); bool fx20Installed = Islnstalled(FrameworkVersion.Fx20);

listBoxl.Items.Add(String.Format( .NET Framework 1.1 installed? {0} ,

fxlllnstalled));

if (fxlllnstalled) {

listBoxl.Items.Add(String.Format(

.NET Framework 1.1 Exact Version: {0} ,

GetExactVersion(FrameworkVersion.Fxll))); listBoxl.Items.Add(String.Format(

.NET Framework 1.1 Service Pack: {0} ,

GetServicePackLevel(FrameworkVersion.Fxll)));

return ret;

private static bool IsNetfxllInstalledO {

bool found = false; int regValue = 0;

if (GetRegistryValue(RegistryHive.LocalMachine, Net fxlIRegKeyName, Netfxl1PlusRegValueName, RegistryValueKind.DWord, out regValue))

if (regValue == 1) {

found = true;

return found;

private static bool IsNetfx20Installed() {

bool found = false; int regValue = 0;

if (GetRegistryValue(RegistryHive.LocalMachine, Net fx2ORegKeyName, Netfxl1PlusRegValueName,

switch (frameworkVersion) {

case FrameworkVersion.Fxll:

ret = IsNetfxllInstalledO ; break;

case FrameworkVersion.Fx20:

ret = IsNetfx20Installed(); break;

default: break;

private static bool GetRegistryValue<T>(RegistryHive hive, string key, string value, RegistryValueKind kind, out T data)

bool success = false; data = default(T);

using (RegistryKey baseKey =

RegistryKey.OpenRemoteBaseKey(hive. String.Empty))

if (baseKey != null) {

using (RegistryKey registryKey = baseKey.OpenSubKey(key, RegistryKeyPermissionCheck.ReadSubTree))

if (registryKey != null) {

Если ключ был открыт, попытаться извлечь значение. RegistryValueKind kindFound =

registryKey.GetValueKind(value); if (kindFound == kind) {

object regValue =

registryKey.GetValue(value, null); if (regValue != null) {

data = (T)Convert.ChangeType(regValue, typeof(T),

Cultureinfo.InvariantCulture); success = true;

RegistryValueKind.DWord, out regValue))

if (regValue ==1) {

found = true;

return found;