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MSDN Library

Marshal.SizeOf<T> Method

[Supported in the .NET Framework 4.5.1 and later versions]

Returns the size of an unmanaged type in bytes.

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

public static int SizeOf<T>()

Type Parameters


The type whose size is to be returned.

Return Value

Type: System.Int32
The size, in bytes, of the type that is specified by the T generic type parameter.

You can use this method when you do not have a structure. The layout must be sequential or explicit.

The size returned is the size of the unmanaged type. The unmanaged and managed sizes of an object can differ. For character types, the size is affected by the CharSet value applied to that class.

.NET Framework

Supported in: 4.6, 4.5.1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1
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