diff --git a/src/Audio/AudioDevice.cs b/src/Audio/AudioDevice.cs
index 16a5c492..4c3a76d6 100644
--- a/src/Audio/AudioDevice.cs
+++ b/src/Audio/AudioDevice.cs
@@ -107,13 +107,13 @@ namespace MoonWorks.Audio
 
 			IntPtr chainPtr;
 			chainPtr = Marshal.AllocHGlobal(
-				Marshal.SizeOf<FAudio.FAudioEffectChain>()
+				sizeof(FAudio.FAudioEffectChain)
 			);
 
 			FAudio.FAudioEffectChain* reverbChain = (FAudio.FAudioEffectChain*) chainPtr;
 			reverbChain->EffectCount = 1;
 			reverbChain->pEffectDescriptors = Marshal.AllocHGlobal(
-				Marshal.SizeOf<FAudio.FAudioEffectDescriptor>()
+				sizeof(FAudio.FAudioEffectDescriptor)
 			);
 
 			FAudio.FAudioEffectDescriptor* reverbDescriptor =
@@ -146,7 +146,7 @@ namespace MoonWorks.Audio
 			// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
 
 			IntPtr reverbParamsPtr = Marshal.AllocHGlobal(
-				Marshal.SizeOf<FAudio.FAudioFXReverbParameters>()
+				sizeof(FAudio.FAudioFXReverbParameters)
 			);
 
 			FAudio.FAudioFXReverbParameters* reverbParams = (FAudio.FAudioFXReverbParameters*) reverbParamsPtr;
@@ -176,7 +176,7 @@ namespace MoonWorks.Audio
 				ReverbVoice,
 				0,
 				reverbParamsPtr,
-				(uint) Marshal.SizeOf<FAudio.FAudioFXReverbParameters>(),
+				(uint) sizeof(FAudio.FAudioFXReverbParameters),
 				0
 			);
 			Marshal.FreeHGlobal(reverbParamsPtr);
@@ -187,7 +187,7 @@ namespace MoonWorks.Audio
 			{
 				SendCount = 2,
 				pSends = Marshal.AllocHGlobal(
-					2 * Marshal.SizeOf<FAudio.FAudioSendDescriptor>()
+					2 * sizeof(FAudio.FAudioSendDescriptor)
 				)
 			};
 			FAudio.FAudioSendDescriptor* sendDesc = (FAudio.FAudioSendDescriptor*) ReverbSends.pSends;
diff --git a/src/Graphics/CommandBuffer.cs b/src/Graphics/CommandBuffer.cs
index 5afbb57b..bc444456 100644
--- a/src/Graphics/CommandBuffer.cs
+++ b/src/Graphics/CommandBuffer.cs
@@ -511,7 +511,7 @@ namespace MoonWorks.Graphics
 					Device.Handle,
 					Handle,
 					(IntPtr) ptr,
-					(uint) (uniforms.Length * Marshal.SizeOf<T>())
+					(uint) (uniforms.Length * sizeof(T))
 				);
 			}
 		}
@@ -530,7 +530,7 @@ namespace MoonWorks.Graphics
 					Device.Handle,
 					Handle,
 					(IntPtr) ptr,
-					(uint) (uniforms.Length * Marshal.SizeOf<T>())
+					(uint) (uniforms.Length * sizeof(T))
 				);
 			}
 		}
@@ -549,7 +549,7 @@ namespace MoonWorks.Graphics
 					Device.Handle,
 					Handle,
 					(IntPtr) ptr,
-					(uint) (uniforms.Length * Marshal.SizeOf<T>())
+					(uint) (uniforms.Length * sizeof(T))
 				);
 			}
 		}
@@ -745,7 +745,7 @@ namespace MoonWorks.Graphics
 			uint numElements
 		) where T : unmanaged
 		{
-			var elementSize = Marshal.SizeOf<T>();
+			var elementSize = sizeof(T);
 
 			fixed (T* ptr = &data[0])
 			{
@@ -762,19 +762,19 @@ namespace MoonWorks.Graphics
 			}
 		}
 
-		public void SetBufferData<T>(
+		public unsafe void SetBufferData<T>(
 			Buffer buffer,
 			IntPtr dataPtr,
 			uint bufferOffsetInElements,
 			uint numElements
-		) {
+		) where T : unmanaged {
 			Refresh.Refresh_SetBufferData(
 				Device.Handle,
 				Handle,
 				buffer.Handle,
-				(uint) Marshal.SizeOf<T>() * bufferOffsetInElements,
+				(uint) sizeof(T) * bufferOffsetInElements,
 				dataPtr,
-				(uint) Marshal.SizeOf<T>() * numElements
+				(uint) sizeof(T) * numElements
 			);
 		}
 
@@ -794,7 +794,7 @@ namespace MoonWorks.Graphics
 		/// <param name="data">An array of data to copy into the texture.</param>
 		public unsafe void SetTextureData<T>(in TextureSlice textureSlice, T[] data) where T : unmanaged
 		{
-			var size = Marshal.SizeOf<T>();
+			var size = sizeof(T);
 
 			fixed (T* ptr = &data[0])
 			{
diff --git a/src/Graphics/Font/Packer.cs b/src/Graphics/Font/Packer.cs
index 65ff964d..8f0fe665 100644
--- a/src/Graphics/Font/Packer.cs
+++ b/src/Graphics/Font/Packer.cs
@@ -25,8 +25,8 @@ namespace MoonWorks.Graphics.Font
 		{
 			fixed (FontRange *pFontRanges = &fontRanges[0])
 			{
-				var nativeSize = fontRanges.Length * Marshal.SizeOf<Wellspring.FontRange>();
-				void* fontRangeMemory = NativeMemory.Alloc((nuint) fontRanges.Length, (nuint) Marshal.SizeOf<Wellspring.FontRange>());
+				var nativeSize = fontRanges.Length * sizeof(Wellspring.FontRange);
+				void* fontRangeMemory = NativeMemory.Alloc((nuint) fontRanges.Length, (nuint) sizeof(Wellspring.FontRange));
 				System.Buffer.MemoryCopy(pFontRanges, fontRangeMemory, nativeSize, nativeSize);
 
 				var result = Wellspring.Wellspring_PackFontRanges(Handle, (IntPtr) fontRangeMemory, (uint) fontRanges.Length);
diff --git a/src/Graphics/RefreshStructs.cs b/src/Graphics/RefreshStructs.cs
index d0cfc5e7..518db0a0 100644
--- a/src/Graphics/RefreshStructs.cs
+++ b/src/Graphics/RefreshStructs.cs
@@ -128,13 +128,13 @@ namespace MoonWorks.Graphics
 		public VertexInputRate InputRate;
 
 		// Shortcut for the common case of having a single vertex binding.
-		public static VertexBinding Create<T>()
+		public unsafe static VertexBinding Create<T>() where T : unmanaged
 		{
 			return new VertexBinding
 			{
 				Binding = 0,
 				InputRate = VertexInputRate.Vertex,
-				Stride = (uint) Marshal.SizeOf<T>()
+				Stride = (uint) sizeof(T)
 			};
 		}
 	}
diff --git a/src/Graphics/Resources/Buffer.cs b/src/Graphics/Resources/Buffer.cs
index ee90e856..bd737dbd 100644
--- a/src/Graphics/Resources/Buffer.cs
+++ b/src/Graphics/Resources/Buffer.cs
@@ -24,16 +24,16 @@ namespace MoonWorks.Graphics
 		/// <param name="usageFlags">Specifies how the buffer will be used.</param>
 		/// <param name="elementCount">How many elements of type T the buffer will contain.</param>
 		/// <returns></returns>
-		public static Buffer Create<T>(
+		public unsafe static Buffer Create<T>(
 			GraphicsDevice device,
 			BufferUsageFlags usageFlags,
 			uint elementCount
-		)
+		) where T : unmanaged
 		{
 			return new Buffer(
 				device,
 				usageFlags,
-				(uint) Marshal.SizeOf<T>() * elementCount
+				(uint) sizeof(T) * elementCount
 			);
 		}
 
diff --git a/src/Graphics/State/ComputeShaderInfo.cs b/src/Graphics/State/ComputeShaderInfo.cs
index 7787de21..ef831783 100644
--- a/src/Graphics/State/ComputeShaderInfo.cs
+++ b/src/Graphics/State/ComputeShaderInfo.cs
@@ -13,18 +13,18 @@ namespace MoonWorks.Graphics
 		public uint BufferBindingCount;
 		public uint ImageBindingCount;
 
-		public static ComputeShaderInfo Create<T>(
+		public unsafe static ComputeShaderInfo Create<T>(
 			ShaderModule shaderModule,
 			string entryPointName,
 			uint bufferBindingCount,
 			uint imageBindingCount
-		)
+		) where T : unmanaged
 		{
 			return new ComputeShaderInfo
 			{
 				ShaderModule = shaderModule,
 				EntryPointName = entryPointName,
-				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				UniformBufferSize = (uint) sizeof(T),
 				BufferBindingCount = bufferBindingCount,
 				ImageBindingCount = imageBindingCount
 			};
diff --git a/src/Graphics/State/GraphicsShaderInfo.cs b/src/Graphics/State/GraphicsShaderInfo.cs
index 069cca1c..b0e84e5b 100644
--- a/src/Graphics/State/GraphicsShaderInfo.cs
+++ b/src/Graphics/State/GraphicsShaderInfo.cs
@@ -12,7 +12,7 @@ namespace MoonWorks.Graphics
 		public uint UniformBufferSize;
 		public uint SamplerBindingCount;
 
-		public static GraphicsShaderInfo Create<T>(
+		public unsafe static GraphicsShaderInfo Create<T>(
 			ShaderModule shaderModule,
 			string entryPointName,
 			uint samplerBindingCount
@@ -22,7 +22,7 @@ namespace MoonWorks.Graphics
 			{
 				ShaderModule = shaderModule,
 				EntryPointName = entryPointName,
-				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				UniformBufferSize = (uint) sizeof(T),
 				SamplerBindingCount = samplerBindingCount
 			};
 		}