Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Compilation / MultiTargetingUtil.cs / 1305376 / MultiTargetingUtil.cs
using System; using System.CodeDom; using System.CodeDom.Compiler; using System.Collections.Generic; using System.Configuration; using System.Security.Permissions; using System.Text; using System.Web.Configuration; using System.Web.Hosting; using System.Web.Util; using Microsoft.Build.Utilities; using Microsoft.CSharp; using Microsoft.VisualBasic; using Microsoft.Win32; using FrameworkName=System.Runtime.Versioning.FrameworkName; namespace System.Web.Compilation { internal class MultiTargetingUtil { // Well-known previous versions static internal readonly FrameworkName FrameworkNameV20 = CreateFrameworkName(".NETFramework,Version=v2.0"); static internal readonly FrameworkName FrameworkNameV30 = CreateFrameworkName(".NETFramework,Version=v3.0"); static internal readonly FrameworkName FrameworkNameV35 = CreateFrameworkName(".NETFramework,Version=v3.5"); static internal readonly FrameworkName FrameworkNameV40 = CreateFrameworkName(".NETFramework,Version=v4.0"); internal static Version Version40 = new Version(4, 0); internal static Version Version35 = new Version(3, 5); private static FrameworkName s_targetFrameworkName = null; private static string s_configTargetFrameworkMoniker = null; private static object s_configTargetFrameworkMonikerLock = new object(); private static bool s_initializedConfigTargetFrameworkMoniker = false; private static object s_targetFrameworkNameLock = new object(); private static string s_configTargetFrameworkAttributeName = "targetFramework"; ////// Latest framework version. /// private static FrameworkName s_latestFrameworkName = null; private static Lists_knownFrameworkNames = null; /// /// Returns the target framework moniker, eg ".NETFramework,Version=3.5" /// internal static FrameworkName TargetFrameworkName { get { EnsureFrameworkNamesInitialized(); return s_targetFrameworkName; } set { s_targetFrameworkName = value; } } ////// Returns the current latest known framework moniker, eg ".NETFramework,Version=4.0" /// internal static FrameworkName LatestFrameworkName { get { EnsureFrameworkNamesInitialized(); return s_latestFrameworkName; } } internal static ListKnownFrameworkNames { get { EnsureFrameworkNamesInitialized(); return s_knownFrameworkNames; } } internal static void EnsureFrameworkNamesInitialized() { if (s_targetFrameworkName == null) { lock (s_targetFrameworkNameLock) { if (s_targetFrameworkName == null) { InitializeKnownAndLatestFrameworkNames(); InitializeTargetFrameworkName(); Debug.Assert(s_targetFrameworkName != null, "s_targetFrameworkName should not be null"); } } } } /// /// Finds out what the known framework names and also the latest one /// private static void InitializeKnownAndLatestFrameworkNames() { IListnames = ToolLocationHelper.GetSupportedTargetFrameworks(); Version latestVersion = null; s_knownFrameworkNames = new List (); foreach (string name in names) { FrameworkName frameworkName = new FrameworkName(name); s_knownFrameworkNames.Add(frameworkName); Version version = GetFrameworkNameVersion(frameworkName); if (s_latestFrameworkName == null || latestVersion < version) { s_latestFrameworkName = frameworkName; latestVersion = version; } } } /// /// Returns the string for the target framework as specified in the /// config. /// internal static string ConfigTargetFrameworkMoniker { get { if (!s_initializedConfigTargetFrameworkMoniker) { lock (s_configTargetFrameworkMonikerLock) { if (!s_initializedConfigTargetFrameworkMoniker) { RuntimeConfig appConfig = RuntimeConfig.GetAppConfig(); CompilationSection compConfig = appConfig.Compilation; string targetFramework = compConfig.TargetFramework; if (targetFramework != null) { targetFramework = targetFramework.Trim(); } s_configTargetFrameworkMoniker = targetFramework; s_initializedConfigTargetFrameworkMoniker = true; } } } return s_configTargetFrameworkMoniker; } } ////// Checks what is the target framework version and initializes the targetFrameworkName /// private static void InitializeTargetFrameworkName() { string targetFrameworkMoniker = ConfigTargetFrameworkMoniker; // Check if web.config exists, and if not, assume 4.0 if (!WebConfigExists) { s_targetFrameworkName = FrameworkNameV40; ValidateCompilerVersionFor40AndAbove(); } else if (targetFrameworkMoniker == null) { if (BuildManagerHost.SupportsMultiTargeting) { // We check for null because the user could have specified // an empty string. // TargetFrameworkMoniker was not specified in config, // so we need to check codedom settings. InitializeTargetFrameworkNameFor20Or35(); } else { // We are running in a 4.0 application pool or in the aspnet_compiler, // but the target framework moniker is not specified. // Assume it is 4.0 so that the application can run. s_targetFrameworkName = FrameworkNameV40; } } else { // The targetFrameworkMonike is specified, so we need to validate it. InitializeTargetFrameworkNameFor40AndAbove(targetFrameworkMoniker); } } ////// Verifies that the moniker is valid, and that the version is 4.0 and above. /// private static void ValidateTargetFrameworkMoniker(string targetFrameworkMoniker) { CompilationSection compConfig = RuntimeConfig.GetAppConfig().Compilation; int lineNumber = compConfig.ElementInformation.LineNumber; string source = compConfig.ElementInformation.Source; try { string moniker = targetFrameworkMoniker; // Try treating it as a version, eg "4.0" first. Version v = GetVersion(targetFrameworkMoniker); if (v != null) { // If it is of the form "4.0", construct the full moniker string, // eg ".NETFramework,Version=v4.0" moniker = ".NETFramework,Version=v" + moniker; } s_targetFrameworkName = CreateFrameworkName(moniker); } catch (ArgumentException e) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_target_framework_version, s_configTargetFrameworkAttributeName, targetFrameworkMoniker, e.Message), source, lineNumber); } Version ver = GetFrameworkNameVersion(s_targetFrameworkName); if (ver < Version40) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_lower_target_version, s_configTargetFrameworkAttributeName), source, lineNumber); } // Check the specified version is no higher than the latest known framework for which we have // reference assemblies installed. Version latestVersion = GetFrameworkNameVersion(LatestFrameworkName); if (latestVersion != null && latestVersion >= ver) { // If the specified version is lower than the latest version installed, // we are fine. return; } // It might be possible that the actual installed (runtime) version is of a higher version, // but the reference assemblies are not installed, so latestFrameworkName might be lower. // In that case we also need to check the registry key. int majorVersion = ver.Major; Version installedTargetVersion = GetInstalledTargetVersion(majorVersion); if (installedTargetVersion != null && installedTargetVersion >= ver) { return; } // If the above two checks failed, report that the version is invalid, higher than expected throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_higher_target_version, s_configTargetFrameworkAttributeName), source, lineNumber); } [RegistryPermission(SecurityAction.Assert, Unrestricted = true)] private static Version GetInstalledTargetVersion(int majorVersion) { // registry key is of the form: // [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full] // "TargetVersion"="4.0.0" // The path includes the major version, eg "v4" or "v5", so we need to use a parameter. string path = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v" + majorVersion + @"\Full"; try { object o = Registry.GetValue(path, "TargetVersion", null); string targetVersion = o as string; if (!string.IsNullOrEmpty(targetVersion)) { Version ver = new Version(targetVersion); return ver; } } catch { // ignore exceptions } return null; } ////// Checks whether the application web.config exists or not /// private static bool WebConfigExists { get { VirtualPath vpath = HttpRuntime.AppDomainAppVirtualPathObject; if (vpath != null) { string path = vpath.SimpleCombine(HttpConfigurationSystem.WebConfigFileName).MapPath(); return System.IO.File.Exists(path); } return false; } } ////// Returns the higher compilerVersion specified in codedom for the case when targeting 2.0/3.5. /// Either "v3.5" is returned, or "v2.0" is returned if the compilerVersion /// is anything other that "v3.5". This is because the root web.config has compilerVersion=v4.0. If we /// know that we are compiling for 2.0 or 3.5, then we override the value to 2.0 if it is not 3.5. /// private static string GetCompilerVersionFor20Or35() { string vbCompilerVersion = GetCSharpCompilerVersion(); string csharpCompilerVersion = GetVisualBasicCompilerVersion(); // The root web.config will have compilerVersion=4.0, so if we are targeting 2.0 or 3.5, we need to // use compilerVersion=2.0 if the compilerVersion is NOT 3.5. vbCompilerVersion = ReplaceCompilerVersionFor20Or35(vbCompilerVersion); csharpCompilerVersion = ReplaceCompilerVersionFor20Or35(csharpCompilerVersion); Version vbVersion = CompilationUtil.GetVersionFromVString(vbCompilerVersion); Version csVersion = CompilationUtil.GetVersionFromVString(csharpCompilerVersion); // Return the larger value as the intended version if (vbVersion > csVersion) { return vbCompilerVersion; } return csharpCompilerVersion; } ////// Checks codedom settings to determine whether we are targeting 2.0 or 3.5. /// private static void InitializeTargetFrameworkNameFor20Or35() { string compilerVersion = GetCompilerVersionFor20Or35(); // Make sure the compiler version is either 2.0 or 3.5 if (CompilationUtil.IsCompilerVersion35(compilerVersion)) { s_targetFrameworkName = FrameworkNameV35; } else if (compilerVersion == "v2.0" || compilerVersion == null) { // If the compiler version is null, it means the user did not set it // in the codedom section. // We use 3.0 because it is not possible to distinguish between 2.0 and 3.0 // by just looking at web.config. s_targetFrameworkName = FrameworkNameV30; } else { throw new ConfigurationErrorsException(SR.GetString(SR.Compiler_version_20_35_required, s_configTargetFrameworkAttributeName)); } } ////// If the compilerVersion is anything other than "v3.5", return "v2.0". /// private static string ReplaceCompilerVersionFor20Or35(string compilerVersion) { if (CompilationUtil.IsCompilerVersion35(compilerVersion)) { return compilerVersion; } return "v2.0"; } private static string GetCSharpCompilerVersion() { return CompilationUtil.GetCompilerVersion(typeof(CSharpCodeProvider)); } private static string GetVisualBasicCompilerVersion() { return CompilationUtil.GetCompilerVersion(typeof(VBCodeProvider)); } private static void ReportInvalidCompilerVersion(string compilerVersion) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_attribute_value, compilerVersion, CompilationUtil.CodeDomProviderOptionPath + "CompilerVersion")); } private static void InitializeTargetFrameworkNameFor40AndAbove(string targetFrameworkMoniker) { ValidateTargetFrameworkMoniker(targetFrameworkMoniker); ValidateCompilerVersionFor40AndAbove(); } ////// Ensures that the compiler version is 4.0 and above. /// private static void ValidateCompilerVersionFor40AndAbove() { // Since the root web.config already specifies 4.0, we need to make sure both compilerVersions // are actually greater than or equal to 4.0, in case the user only sets compilerVersion=3.5 // for one language. (Dev10 bug 738202) ValidateCompilerVersionFor40AndAbove(GetCSharpCompilerVersion()); ValidateCompilerVersionFor40AndAbove(GetVisualBasicCompilerVersion()); } private static void ValidateCompilerVersionFor40AndAbove(string compilerVersion) { if (compilerVersion != null) { Exception exception = null; if (compilerVersion.Length < 4 || compilerVersion[0] != 'v') { ReportInvalidCompilerVersion(compilerVersion); } try { Version version = CompilationUtil.GetVersionFromVString(compilerVersion); if (version < Version40) { throw new ConfigurationErrorsException(SR.GetString(SR.Compiler_version_40_required, s_configTargetFrameworkAttributeName)); } } catch (ArgumentNullException e) { exception = e; } catch (ArgumentOutOfRangeException e) { exception = e; } catch (ArgumentException e) { exception = e; } catch (FormatException e) { exception = e; } catch (OverflowException e) { exception = e; } if (exception != null) { ReportInvalidCompilerVersion(compilerVersion); } } } ////// Returns true if the target framework version is 3.5. /// internal static bool IsTargetFramework35 { get { return Object.Equals(TargetFrameworkName, FrameworkNameV35); } } ////// Returns true if the target framework version is 2.0 or 3.0. /// internal static bool IsTargetFramework20 { get { return Object.Equals(TargetFrameworkName, FrameworkNameV20) || Object.Equals(TargetFrameworkName, FrameworkNameV30); } } // Gets the target framework version as a Version instance. internal static Version TargetFrameworkVersion { get { return GetFrameworkNameVersion(TargetFrameworkName); } } internal static bool IsTargetFramework40OrAbove { get { return MultiTargetingUtil.TargetFrameworkVersion.Major >= 4; } } ////// Enable use of RAR only in CBM scenarios /// internal static bool EnableReferenceAssemblyResolution { get { return BuildManagerHost.InClientBuildManager; // Enable only in CBM scenarios. } } internal static FrameworkName CreateFrameworkName(string name) { return new FrameworkName(name); } private static Version GetFrameworkNameVersion(FrameworkName name) { if (name == null) { return null; } return name.Version; } ////// Returns a Version instance if possible from the version string. /// Otherwise returns null. /// private static Version GetVersion(string version) { if (string.IsNullOrEmpty(version) || !char.IsDigit(version[0])) { return null; } try { Version ver = new Version(version); return ver; } catch { } return null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.CodeDom; using System.CodeDom.Compiler; using System.Collections.Generic; using System.Configuration; using System.Security.Permissions; using System.Text; using System.Web.Configuration; using System.Web.Hosting; using System.Web.Util; using Microsoft.Build.Utilities; using Microsoft.CSharp; using Microsoft.VisualBasic; using Microsoft.Win32; using FrameworkName=System.Runtime.Versioning.FrameworkName; namespace System.Web.Compilation { internal class MultiTargetingUtil { // Well-known previous versions static internal readonly FrameworkName FrameworkNameV20 = CreateFrameworkName(".NETFramework,Version=v2.0"); static internal readonly FrameworkName FrameworkNameV30 = CreateFrameworkName(".NETFramework,Version=v3.0"); static internal readonly FrameworkName FrameworkNameV35 = CreateFrameworkName(".NETFramework,Version=v3.5"); static internal readonly FrameworkName FrameworkNameV40 = CreateFrameworkName(".NETFramework,Version=v4.0"); internal static Version Version40 = new Version(4, 0); internal static Version Version35 = new Version(3, 5); private static FrameworkName s_targetFrameworkName = null; private static string s_configTargetFrameworkMoniker = null; private static object s_configTargetFrameworkMonikerLock = new object(); private static bool s_initializedConfigTargetFrameworkMoniker = false; private static object s_targetFrameworkNameLock = new object(); private static string s_configTargetFrameworkAttributeName = "targetFramework"; ////// Latest framework version. /// private static FrameworkName s_latestFrameworkName = null; private static Lists_knownFrameworkNames = null; /// /// Returns the target framework moniker, eg ".NETFramework,Version=3.5" /// internal static FrameworkName TargetFrameworkName { get { EnsureFrameworkNamesInitialized(); return s_targetFrameworkName; } set { s_targetFrameworkName = value; } } ////// Returns the current latest known framework moniker, eg ".NETFramework,Version=4.0" /// internal static FrameworkName LatestFrameworkName { get { EnsureFrameworkNamesInitialized(); return s_latestFrameworkName; } } internal static ListKnownFrameworkNames { get { EnsureFrameworkNamesInitialized(); return s_knownFrameworkNames; } } internal static void EnsureFrameworkNamesInitialized() { if (s_targetFrameworkName == null) { lock (s_targetFrameworkNameLock) { if (s_targetFrameworkName == null) { InitializeKnownAndLatestFrameworkNames(); InitializeTargetFrameworkName(); Debug.Assert(s_targetFrameworkName != null, "s_targetFrameworkName should not be null"); } } } } /// /// Finds out what the known framework names and also the latest one /// private static void InitializeKnownAndLatestFrameworkNames() { IListnames = ToolLocationHelper.GetSupportedTargetFrameworks(); Version latestVersion = null; s_knownFrameworkNames = new List (); foreach (string name in names) { FrameworkName frameworkName = new FrameworkName(name); s_knownFrameworkNames.Add(frameworkName); Version version = GetFrameworkNameVersion(frameworkName); if (s_latestFrameworkName == null || latestVersion < version) { s_latestFrameworkName = frameworkName; latestVersion = version; } } } /// /// Returns the string for the target framework as specified in the /// config. /// internal static string ConfigTargetFrameworkMoniker { get { if (!s_initializedConfigTargetFrameworkMoniker) { lock (s_configTargetFrameworkMonikerLock) { if (!s_initializedConfigTargetFrameworkMoniker) { RuntimeConfig appConfig = RuntimeConfig.GetAppConfig(); CompilationSection compConfig = appConfig.Compilation; string targetFramework = compConfig.TargetFramework; if (targetFramework != null) { targetFramework = targetFramework.Trim(); } s_configTargetFrameworkMoniker = targetFramework; s_initializedConfigTargetFrameworkMoniker = true; } } } return s_configTargetFrameworkMoniker; } } ////// Checks what is the target framework version and initializes the targetFrameworkName /// private static void InitializeTargetFrameworkName() { string targetFrameworkMoniker = ConfigTargetFrameworkMoniker; // Check if web.config exists, and if not, assume 4.0 if (!WebConfigExists) { s_targetFrameworkName = FrameworkNameV40; ValidateCompilerVersionFor40AndAbove(); } else if (targetFrameworkMoniker == null) { if (BuildManagerHost.SupportsMultiTargeting) { // We check for null because the user could have specified // an empty string. // TargetFrameworkMoniker was not specified in config, // so we need to check codedom settings. InitializeTargetFrameworkNameFor20Or35(); } else { // We are running in a 4.0 application pool or in the aspnet_compiler, // but the target framework moniker is not specified. // Assume it is 4.0 so that the application can run. s_targetFrameworkName = FrameworkNameV40; } } else { // The targetFrameworkMonike is specified, so we need to validate it. InitializeTargetFrameworkNameFor40AndAbove(targetFrameworkMoniker); } } ////// Verifies that the moniker is valid, and that the version is 4.0 and above. /// private static void ValidateTargetFrameworkMoniker(string targetFrameworkMoniker) { CompilationSection compConfig = RuntimeConfig.GetAppConfig().Compilation; int lineNumber = compConfig.ElementInformation.LineNumber; string source = compConfig.ElementInformation.Source; try { string moniker = targetFrameworkMoniker; // Try treating it as a version, eg "4.0" first. Version v = GetVersion(targetFrameworkMoniker); if (v != null) { // If it is of the form "4.0", construct the full moniker string, // eg ".NETFramework,Version=v4.0" moniker = ".NETFramework,Version=v" + moniker; } s_targetFrameworkName = CreateFrameworkName(moniker); } catch (ArgumentException e) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_target_framework_version, s_configTargetFrameworkAttributeName, targetFrameworkMoniker, e.Message), source, lineNumber); } Version ver = GetFrameworkNameVersion(s_targetFrameworkName); if (ver < Version40) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_lower_target_version, s_configTargetFrameworkAttributeName), source, lineNumber); } // Check the specified version is no higher than the latest known framework for which we have // reference assemblies installed. Version latestVersion = GetFrameworkNameVersion(LatestFrameworkName); if (latestVersion != null && latestVersion >= ver) { // If the specified version is lower than the latest version installed, // we are fine. return; } // It might be possible that the actual installed (runtime) version is of a higher version, // but the reference assemblies are not installed, so latestFrameworkName might be lower. // In that case we also need to check the registry key. int majorVersion = ver.Major; Version installedTargetVersion = GetInstalledTargetVersion(majorVersion); if (installedTargetVersion != null && installedTargetVersion >= ver) { return; } // If the above two checks failed, report that the version is invalid, higher than expected throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_higher_target_version, s_configTargetFrameworkAttributeName), source, lineNumber); } [RegistryPermission(SecurityAction.Assert, Unrestricted = true)] private static Version GetInstalledTargetVersion(int majorVersion) { // registry key is of the form: // [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full] // "TargetVersion"="4.0.0" // The path includes the major version, eg "v4" or "v5", so we need to use a parameter. string path = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v" + majorVersion + @"\Full"; try { object o = Registry.GetValue(path, "TargetVersion", null); string targetVersion = o as string; if (!string.IsNullOrEmpty(targetVersion)) { Version ver = new Version(targetVersion); return ver; } } catch { // ignore exceptions } return null; } ////// Checks whether the application web.config exists or not /// private static bool WebConfigExists { get { VirtualPath vpath = HttpRuntime.AppDomainAppVirtualPathObject; if (vpath != null) { string path = vpath.SimpleCombine(HttpConfigurationSystem.WebConfigFileName).MapPath(); return System.IO.File.Exists(path); } return false; } } ////// Returns the higher compilerVersion specified in codedom for the case when targeting 2.0/3.5. /// Either "v3.5" is returned, or "v2.0" is returned if the compilerVersion /// is anything other that "v3.5". This is because the root web.config has compilerVersion=v4.0. If we /// know that we are compiling for 2.0 or 3.5, then we override the value to 2.0 if it is not 3.5. /// private static string GetCompilerVersionFor20Or35() { string vbCompilerVersion = GetCSharpCompilerVersion(); string csharpCompilerVersion = GetVisualBasicCompilerVersion(); // The root web.config will have compilerVersion=4.0, so if we are targeting 2.0 or 3.5, we need to // use compilerVersion=2.0 if the compilerVersion is NOT 3.5. vbCompilerVersion = ReplaceCompilerVersionFor20Or35(vbCompilerVersion); csharpCompilerVersion = ReplaceCompilerVersionFor20Or35(csharpCompilerVersion); Version vbVersion = CompilationUtil.GetVersionFromVString(vbCompilerVersion); Version csVersion = CompilationUtil.GetVersionFromVString(csharpCompilerVersion); // Return the larger value as the intended version if (vbVersion > csVersion) { return vbCompilerVersion; } return csharpCompilerVersion; } ////// Checks codedom settings to determine whether we are targeting 2.0 or 3.5. /// private static void InitializeTargetFrameworkNameFor20Or35() { string compilerVersion = GetCompilerVersionFor20Or35(); // Make sure the compiler version is either 2.0 or 3.5 if (CompilationUtil.IsCompilerVersion35(compilerVersion)) { s_targetFrameworkName = FrameworkNameV35; } else if (compilerVersion == "v2.0" || compilerVersion == null) { // If the compiler version is null, it means the user did not set it // in the codedom section. // We use 3.0 because it is not possible to distinguish between 2.0 and 3.0 // by just looking at web.config. s_targetFrameworkName = FrameworkNameV30; } else { throw new ConfigurationErrorsException(SR.GetString(SR.Compiler_version_20_35_required, s_configTargetFrameworkAttributeName)); } } ////// If the compilerVersion is anything other than "v3.5", return "v2.0". /// private static string ReplaceCompilerVersionFor20Or35(string compilerVersion) { if (CompilationUtil.IsCompilerVersion35(compilerVersion)) { return compilerVersion; } return "v2.0"; } private static string GetCSharpCompilerVersion() { return CompilationUtil.GetCompilerVersion(typeof(CSharpCodeProvider)); } private static string GetVisualBasicCompilerVersion() { return CompilationUtil.GetCompilerVersion(typeof(VBCodeProvider)); } private static void ReportInvalidCompilerVersion(string compilerVersion) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_attribute_value, compilerVersion, CompilationUtil.CodeDomProviderOptionPath + "CompilerVersion")); } private static void InitializeTargetFrameworkNameFor40AndAbove(string targetFrameworkMoniker) { ValidateTargetFrameworkMoniker(targetFrameworkMoniker); ValidateCompilerVersionFor40AndAbove(); } ////// Ensures that the compiler version is 4.0 and above. /// private static void ValidateCompilerVersionFor40AndAbove() { // Since the root web.config already specifies 4.0, we need to make sure both compilerVersions // are actually greater than or equal to 4.0, in case the user only sets compilerVersion=3.5 // for one language. (Dev10 bug 738202) ValidateCompilerVersionFor40AndAbove(GetCSharpCompilerVersion()); ValidateCompilerVersionFor40AndAbove(GetVisualBasicCompilerVersion()); } private static void ValidateCompilerVersionFor40AndAbove(string compilerVersion) { if (compilerVersion != null) { Exception exception = null; if (compilerVersion.Length < 4 || compilerVersion[0] != 'v') { ReportInvalidCompilerVersion(compilerVersion); } try { Version version = CompilationUtil.GetVersionFromVString(compilerVersion); if (version < Version40) { throw new ConfigurationErrorsException(SR.GetString(SR.Compiler_version_40_required, s_configTargetFrameworkAttributeName)); } } catch (ArgumentNullException e) { exception = e; } catch (ArgumentOutOfRangeException e) { exception = e; } catch (ArgumentException e) { exception = e; } catch (FormatException e) { exception = e; } catch (OverflowException e) { exception = e; } if (exception != null) { ReportInvalidCompilerVersion(compilerVersion); } } } ////// Returns true if the target framework version is 3.5. /// internal static bool IsTargetFramework35 { get { return Object.Equals(TargetFrameworkName, FrameworkNameV35); } } ////// Returns true if the target framework version is 2.0 or 3.0. /// internal static bool IsTargetFramework20 { get { return Object.Equals(TargetFrameworkName, FrameworkNameV20) || Object.Equals(TargetFrameworkName, FrameworkNameV30); } } // Gets the target framework version as a Version instance. internal static Version TargetFrameworkVersion { get { return GetFrameworkNameVersion(TargetFrameworkName); } } internal static bool IsTargetFramework40OrAbove { get { return MultiTargetingUtil.TargetFrameworkVersion.Major >= 4; } } ////// Enable use of RAR only in CBM scenarios /// internal static bool EnableReferenceAssemblyResolution { get { return BuildManagerHost.InClientBuildManager; // Enable only in CBM scenarios. } } internal static FrameworkName CreateFrameworkName(string name) { return new FrameworkName(name); } private static Version GetFrameworkNameVersion(FrameworkName name) { if (name == null) { return null; } return name.Version; } ////// Returns a Version instance if possible from the version string. /// Otherwise returns null. /// private static Version GetVersion(string version) { if (string.IsNullOrEmpty(version) || !char.IsDigit(version[0])) { return null; } try { Version ver = new Version(version); return ver; } catch { } return null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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