C# Language Reference
/unsafe (Enable Unsafe Mode) (C# Compiler Options)
The /unsafe compiler option allows code that uses the unsafe keyword to compile.
/unsafe
Remarks
For more information about unsafe code, see Unsafe Code and Pointers (C# Programming Guide).
To set this compiler option in the Visual Studio development environment
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Open the project's Properties page.
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Click the Build property page.
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Select the Allow Unsafe Code check box.
For information about how to set this compiler option programmatically, see AllowUnsafeBlocks.
Example
Compile in.cs for unsafe mode:
csc /unsafe in.cs
See Also