Marshal::WriteByte Method (IntPtr, Int32, Byte)
.NET Framework (current version)
Writes a single byte value to unmanaged memory at a specified offset.
Assembly: mscorlib (in mscorlib.dll)
public: [SecurityCriticalAttribute] static void WriteByte( IntPtr ptr, int ofs, unsigned char val )
Parameters
- ptr
-
Type:
System::IntPtr
The base address in unmanaged memory to write to.
- ofs
-
Type:
System::Int32
An additional byte offset, which is added to the ptr parameter before writing.
- val
-
Type:
System::Byte
The value to write.
| Exception | Condition |
|---|---|
| AccessViolationException | Base address (ptr) plus offset byte (ofs) produces a null or invalid address. |
WriteByte enables direct interaction with an unmanaged C-style byte array, eliminating the expense of copying an entire unmanaged array (using Marshal::Copy) to a separate managed array before setting its element values.
SecurityCriticalAttribute
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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