<requiredRuntime> Element

Specifies that the application supports only version 1.0 of the common language runtime.

   version="runtime version"

The following sections describe attributes, child elements, and parent elements.


Attribute Description


Optional attribute.

A String value that specifies the version of the .NET Framework that this application supports. The string value must match the directory name found under the .NET Framework installation root. The contents of the string value are not parsed.


Optional attribute.

Specifies whether the runtime startup code searches the registry to determine the runtime version.

Safemode Attribute

Value Description


Looks in the registry. This is the default value.


Does not look in the registry.

Child Elements


Parent Elements

Element Description


The root element in every configuration file used by the common language runtime and .NET Framework applications.


Contains the requiredRuntime element.

The <supportedRuntime> element should be used by all applications built using version 1.1 or later of the runtime. Applications built to support only version 1.0 of the runtime must use the <requiredRuntime> element.

The version attribute string must match the installation folder name for the specified version of the .NET Framework. This string is not interpreted. If the runtime startup code does not find a matching folder, the runtime is not loaded; the startup code shows an error message and quits.


The startup code for an application hosted in Microsoft Internet Explorer ignores the <requiredRuntime> element.

The following example shows how to specify the runtime version in a configuration file.

      <requiredRuntime version="v1.0.3705" safemode="true"/>