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DefaultDllImportSearchPathsAttribute Class

.NET Framework 4.5

Specifies the paths that are used to search for DLLs that provide functions for platform invokes.

System.Object
  System.Attribute
    System.Runtime.InteropServices.DefaultDllImportSearchPathsAttribute

Namespace:  System.Runtime.InteropServices
Assemblies:   mscorlib (in mscorlib.dll)
  System.Runtime.InteropServices (in System.Runtime.InteropServices.dll)

[AttributeUsageAttribute(AttributeTargets.Assembly|AttributeTargets.Method, AllowMultiple = false)]
[ComVisibleAttribute(false)]
public sealed class DefaultDllImportSearchPathsAttribute : Attribute

The DefaultDllImportSearchPathsAttribute type exposes the following members.

  NameDescription
Public methodSupported in .NET for Windows Store appsDefaultDllImportSearchPathsAttributeInitializes a new instance of the DefaultDllImportSearchPathsAttribute class, specifying the paths to use when searching for the targets of platform invokes.
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  NameDescription
Public propertySupported in .NET for Windows Store appsPathsGets a bitwise combination of enumeration values that specify the paths that the LoadLibraryEx function searches during platform invokes.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodSupported in .NET for Windows Store appsEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Public methodSupported in .NET for Windows Store appsGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodSupported in .NET for Windows Store appsGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public methodSupported in .NET for Windows Store appsToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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When applied to an assembly, this attribute specifies the paths that are used by default to search for any DLL that provides a function for a platform invoke, in any code in the assembly. When applied to an individual platform invoke, this attribute overrides the default search paths that were specified for the assembly.

This attribute is ignored for any platform invoke that specifies an absolute path.

Use this attribute to prevent the Win32 LoadLibraryEx function from searching the current working directory. This helps protect your application from attacks in which malicious software places a DLL in the current working directory, so that when a platform invoke calls the Win32 LoadLibraryEx function, the function's default search order finds the malicious DLL instead of the system DLL it was intended to find.

The common language runtime handles the call to the LoadLibraryEx function according to the following algorithm:

  1. If the attribute is applied to an individual platform invoke, use the values specified by that instance of the attribute.

  2. Otherwise, if the attribute is applied to the assembly that contains the platform invoke, use the values specified by that instance of the attribute.

  3. Otherwise, search the assembly directory and then call the LoadLibraryEx function with the LOAD_WITH_ALTERED_SEARCH_PATH flag.

.NET Framework

Supported in: 4.6

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Windows Phone 8.1

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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