int numberVerts = 8; 
short[] indices = { 
                        0,1,2, // Front Face  
                        1,3,2, // Front Face  
                        4,5,6, // Back Face  
                        6,5,7, // Back Face  
                        0,5,4, // Top Face  
                        0,2,5, // Top Face  
 
                        1,6,7, // Bottom Face  
                        1,7,3, // Bottom Face  
                        0,6,1, // Left Face  
                        4,6,0, // Left Face  
                        2,3,7, // Right Face  
                        5,2,7 // Right Face  
                    }; 
 
// create the mesh object 
Mesh mesh = new Mesh(indices.Length / 3, numberVerts, MeshFlags.Managed, 
    CustomVertex.PositionColored.Format, device); 
 
// set vertex buffer data 
using(VertexBuffer vb = mesh.VertexBuffer) 
{ 
    GraphicsStream data = vb.Lock(0, 0, LockFlags.None); 
 
    data.Write(new CustomVertex.PositionColored(-1.0f, 1.0f, 1.0f, 0x00ff00ff)); 
    data.Write(new CustomVertex.PositionColored(-1.0f, -1.0f, 1.0f, 0x00ffff00)); 
    data.Write(new CustomVertex.PositionColored(1.0f, 1.0f, 1.0f, 0x0000ffff)); 
    data.Write(new CustomVertex.PositionColored(1.0f, -1.0f, 1.0f, 0x00ff0000)); 
    data.Write(new CustomVertex.PositionColored(-1.0f, 1.0f, -1.0f, 0x000000ff)); 
    data.Write(new CustomVertex.PositionColored(1.0f, 1.0f, -1.0f, 0x0000ff00)); 
    data.Write(new CustomVertex.PositionColored(-1.0f, -1.0f, -1.0f, 0x00ffffff)); 
    data.Write(new CustomVertex.PositionColored(1.0f, -1.0f, -1.0f, 0x00000000)); 
 
    vb.Unlock(); 
} 
 
// set index buffer data 
using (IndexBuffer ib = mesh.IndexBuffer) 
{ 
    ib.SetData(indices, 0, LockFlags.None); 
} 
 
 
// Set attribute buffer data, setting the attribute  
// ID (subset #) for each face in the attribute buffer 
int[] attribBuffer = mesh.LockAttributeBufferArray(LockFlags.None); 
     
// first 6 faces will be subset 0 
for( int i = 0; i < 6; i++) 
{ 
    attribBuffer[i] = 0; 
} 
 
// last 6 faces will be subset 1 
for( int i = 0; i < 6; i++) 
{ 
    attribBuffer[i + 6] = 1; 
} 
 
// unlock and update the buffer 
mesh.UnlockAttributeBuffer(attribBuffer); 
 
// Here we manually create the attribute table for the mesh, 
// notice that this does NOT affect the vertices, but only 
// updates the internal attribute table for future reference. 
AttributeRange subset1 = new AttributeRange(); 
subset1.AttributeId = 0;             
subset1.FaceStart = 0; 
subset1.FaceCount = 6; 
subset1.VertexCount = 36; 
subset1.VertexStart = 0; 
 
AttributeRange subset2 = new AttributeRange(); 
subset2.AttributeId = 1;             
subset2.FaceStart = 6; 
subset2.FaceCount = 6; 
subset2.VertexCount = 36; 
subset2.VertexStart = 0; 
 
mesh.SetAttributeTable( 
    new AttributeRange[] 
    { 
        subset1, 
        subset2 
    }); 
 
 
// Updating the attribute table can also be done automatically  
// by optimizing the mesh in place, like this: 
/* 
    int[] adj = new int[indices.Length]; 
    mesh.GenerateAdjacency(0.1f, adj); 
    mesh.OptimizeInPlace( MeshFlags.OptimizeAttributeSort, adj); 
*/ 
 
System.Diagnostics.Debug.WriteLine("New number of subsets in mesh: " + mesh.NumberAttributes);