<gcAllowVeryLargeObjects> element
On 64-bit platforms, enables arrays that are greater than 2 gigabytes (GB) in total size.
<configuration>
<runtime>
<gcAllowVeryLargeObjects>
Syntax
<gcAllowVeryLargeObjects enabled="true|false" />
Attributes
| Attribute | Description |
|---|---|
enabled |
Required attribute. Specifies whether arrays that are greater than 2 GB in total size are enabled on 64-bit platforms. |
enabled attribute
| Value | Description |
|---|---|
false |
Arrays greater than 2 GB in total size are not enabled. This is the default. |
true |
Arrays greater than 2 GB in total size are enabled on 64-bit platforms. |
Child elements
None.
Parent elements
| Element | Description |
|---|---|
configuration |
The root element in every configuration file used by the common language runtime and .NET Framework applications. |
runtime |
Contains information about runtime initialization options. |
Remarks
Using this element in your application configuration file enables arrays that are larger than 2 GB in size, but does not change other limits on object size or array size:
The maximum number of elements in an array is UInt32.MaxValue.
The maximum size in any single dimension is 2,147,483,591 (0x7FFFFFC7) for byte arrays and arrays of single-byte structures, and 2,146,435,071 (0X7FEFFFFF) for arrays containing other types.
The maximum size for strings and other non-array objects is unchanged.
Caution
Before enabling this feature, ensure that your application does not include unsafe code that assumes that all arrays are smaller than 2 GB in size. For example, unsafe code that uses arrays as buffers might be susceptible to buffer overruns if it's written on the assumption that arrays will not exceed 2 GB.
Example
The following app.config file snippet shows how to enable this feature for a .NET Framework application.
<configuration>
<runtime>
<gcAllowVeryLargeObjects enabled="true" />
</runtime>
</configuration>
Supported in
.NET Framework 4.5 and later versions
