public override string ToString()
{
return ( new System.Text.StringBuilder() )
.AppendFormat( "blendType : {0}; opertaion : {1}; source1 : {2}; source2 : {3}; colorArg1 : {4}; colorArg2 : {5}; alphaArg1 : {6}; alphaArg2 : {7}; blendType : {8};",
this.blendType,
this.operation,
this.source1,
this.source2,
this.colorArg1,
this.colorArg2,
this.alphaArg1,
this.alphaArg2,
this.blendFactor ).ToString();
}